Sunan an-Nasa'i 1350

Musa ibn Hizam al-Tirmidhi informed us; he said: Yahya ibn Adam narrated to us, from Ibn Idris, from Hisham ibn Hassan, from Muhammad ibn Sirin, from Kathir ibn Aflah, from Zayd ibn Thabit, who said: They were commanded to glorify Allah thirty-three times after every prayer, praise Him thirty-three times, and declare His greatness thirty-four times. Then, in a dream, a man from the Ansar was visited and told, “Did the Messenger of Allah (peace and blessings be upon him) command you to glorify Allah thirty-three times after every prayer, praise Him thirty-three times, and declare His greatness thirty-four times?” He said, “Yes.” The visitor said, “Make them twenty-five, and include the declaration of Allah’s oneness among them.” When morning came, the man went to the Prophet (peace and blessings be upon him) and told him about it. He said, “Make them that way.”