Validity of a child's hajj, and the reward of the one who takes him for Hajj Sahih Muslim 1336 c

Arabic hadith text
وَحَدَّثَنِي مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، حَدَّثَنَا سُفْيَانُ، عَنْ إِبْرَاهِيمَ بْنِ عُقْبَةَ، عَنْ كُرَيْبٍ،أَنَّ امْرَأَةً، رَفَعَتْ صَبِيًّا فَقَالَتْ يَا رَسُولَ اللَّهِ أَلِهَذَا حَجٌّ قَالَ ‏"‏ نَعَمْ وَلَكِ أَجْرٌ ‏"‏ ‏.‏
Translation
Karaib reported

A woman lifted a child and said: Messenger of Allah, would he be credited with Hajj? He said: Yes. and for you there would be a reward.