Originally, two rak`at were prescribed in every prayer. When the Prophet (ﷺ) migrated (to Medina) four rak`at were enjoined, while the journey prayer remained unchanged(i.e. two rak`at).

In the year of Hajjat-ul-Wada` the Prophet (ﷺ) visited me when I fell ill and was about to die because of that illness. I said, "O Allah's Messenger (ﷺ)! I am very ill as you see, and I am a rich man and have no heir except my only daughter. Shall I give 2/3 of my property in charity?" He said, "No." I said, "Shall I then give one half of it in charity?" He said, "O Sa`d! Give 1/3 (in charity) and even 1/3 is too much. No doubt, it is better to leave your children rich than to leave them poor, reduced to begging from others. And Allah will reward you for whatever you spend with the intention of gaining Allah's Pleasure even if it were a mouthful of food you put into your wives mouth." I said, "O Allah's Apostle! Am I to be left behind (in Mecca) after my companions have gone?" He said, "If you should be left behind, you will be upgraded and elevated for every deed you will do with a desire to achieve Allah's Pleasure. I hope that you will live long so that some people will benefit by you while others will be harmed. O Allah! Please fulfill the migration of my companions and do not make them turn back on their heels. But (we feel sorry for) the unlucky Sa`d bin Khaulah." Allah's Messenger (ﷺ) lamented his death in Mecca.

When `Abdur-Rahman bin `Auf came to Medina and the Prophet (ﷺ) established the bond of brotherhood between him and Sa`d bin Ar-Rabi-al-Ansari, Saud suggested that `Abdur-Rahman should accept half of his property and family. `Abdur Rahman said, "May Allah bless you in your family and property; guide me to the market." So `Abdur-Rahman (while doing business in the market) made some profit of some condensed dry yoghurt and butter. After a few days the Prophet (ﷺ) saw him wearing clothes stained with yellow perfume. The Prophet (ﷺ) asked, "What is this, O `Abdur-Rahman?" He said, "O Allah's Messenger (ﷺ)! I have married an Ansar' woman." The Prophet (ﷺ) asked, "What have you given her as Mahr?" He (i.e. `Abdur-Rahman) said, "A piece of gold, about the weight of a date stone." Then the Prophet said, Give a banquet, even though of a sheep."

When the news of the arrival of the Prophet (ﷺ) at Medina reached `Abdullah bin Salam, he went to him to ask him about certain things, He said, "I am going to ask you about three things which only a Prophet can answer: What is the first sign of The Hour? What is the first food which the people of Paradise will eat? Why does a child attract the similarity to his father or to his mother?" The Prophet (ﷺ) replied, "Gabriel has just now informed me of that." Ibn Salam said, "He (i.e. Gabriel) is the enemy of the Jews amongst the angels. The Prophet (ﷺ) said, "As for the first sign of The Hour, it will be a fire that will collect the people from the East to the West. As for the first meal which the people of Paradise will eat, it will be the caudate (extra) lobe of the fish-liver. As for the child, if the man's discharge proceeds the woman's discharge, the child attracts the similarity to the man, and if the woman's discharge proceeds the man's, then the child attracts the similarity to the woman." On this, `Abdullah bin Salam said, "I testify that None has the right to be worshipped except Allah, and that you are the Messenger of Allah." and added, "O Allah's Messenger (ﷺ)! Jews invent such lies as make one astonished, so please ask them about me before they know about my conversion to I slam . " The Jews came, and the Prophet (ﷺ) said, "What kind of man is `Abdullah bin Salam among you?" They replied, "The best of us and the son of the best of us and the most superior among us, and the son of the most superior among us. "The Prophet (ﷺ) said, "What would you think if `Abdullah bin Salam should embrace Islam?" They said, "May Allah protect him from that." The Prophet (ﷺ) repeated his question and they gave the same answer. Then `Abdullah came out to them and said, "I testify that None has the right to be worshipped except Allah and that Muhammad is the Messenger of Allah!" On this, the Jews said, "He is the most wicked among us and the son of the most wicked among us." So they degraded him. On this, he (i.e. `Abdullah bin Salam) said, "It is this that I was afraid of, O Allah's Messenger (ﷺ).

A partner of mine sold some Dirhams on credit in the market. I said, "Glorified be Allah! Is this legal?" He replied, "Glorified be Allah! By Allah, when I sold them in the market, nobody objected to it." Then I asked Al-Bara' bin `Azib (about it) he said, "We used to make such a transaction when the Prophet came to Medina. So he said, 'There is no harm in it if it is done from hand to hand, but it is not allowed on credit.' Go to Zaid bin Al- Arqam and ask him about it for he was the greatest trader of all of us." So I asked Zaid bin Al-Arqam., and he said the same (as Al-Bara) did."

The Prophet (ﷺ) said, "Had only ten Jews (amongst their chiefs) believe me, all the Jews would definitely have believed me."

When the Prophet (ﷺ) arrived at Medina, he noticed that some people among the Jews used to respect Ashura' (i.e. 10th of Muharram) and fast on it. The Prophet (ﷺ) then said, "We have more right to observe fast on this day." and ordered that fasting should be observed on it.

When the Prophet (ﷺ) arrived at Medina he found that the Jews observed fast on the day of 'Ashura'. They were asked the reason for the fast. They replied, "This is the day when Allah caused Moses and the children of Israel to have victory over Pharaoh, so we fast on this day as a sign of glorifying it." Allah's Messenger (ﷺ) said, "We are closer to Moses than you." Then he ordered that fasting on this day should be observed.

The Prophet (ﷺ) used to keep his hair falling loose while the pagans used to part their hair, and the People of the Scriptures used to keep their hair falling loose, and the Prophet (ﷺ) liked to follow the People of the Scriptures in matters about which he had not been instructed differently, but later on the Prophet (ﷺ) started parting his hair.

They, the people of the Scriptures, divided this Scripture into parts, believing in some portions of it and disbelieving the others. (See 15:91)

That he was sold (as a slave) by one master to another for more than ten times (i.e between 13 and 19).

I am from Ram-Hurmuz (i.e. a Persian town).

The interval between Jesus and Muhammad was six hundred years.