Who art thou? He said: (I am) Messengef of Allah. A woman (then) lifted up a boy to him and said: Would this child be credited with having performed the Hajj? Thereupon he said: Yes, and you will have a reward.  

عَنِ النَّبِيِّ ﷺ لَقِيَ رَكْبًا بِالرَّوْحَاءِ فَقَالَ: «مَنِ الْقَوْمُ؟» قَالُوا: الْمُسْلِمُونَ، فَقَالُوا مَنْ أَنْتَ؟ قَالَ: «رَسُولُ اللَّهِ!» فَرَفَعَتْ إِلَيْهِ امْرَأَةٌ صَبِيًّا فَقَالَتْ: أَلِهَذَا حَجٌّ؟ قَالَ: «نَعَمْ، وَلَكِ أَجْرٌ۔»  

A woman lifted up her child and said: Messenger of Allah, would the child be credited with having performed the Hajj? Thereupon he said: Yes, and there would be a reward for you.  

رَفَعَتِ امْرَأَةٌ صَبِيًّا لَهَا فَقَالَتْ يَا رَسُولَ اللَّهِ أَلِهَذَا حَجٌّ قَالَ نَعَمْ وَلَكِ أَجْرٌ  

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.  

أَنَّ امْرَأَةً رَفَعَتْ صَبِيًّا فَقَالَتْ يَا رَسُولَ اللَّهِ أَلِهَذَا حَجٌّ قَالَ نَعَمْ وَلَكِ أَجْرٌ  

A hadith like this has been narrated on the authority of Ibn 'Abbas through another chain of transmitters.  

عَنِ ابْنِ عَبَّاسٍ بِمِثْلِهِ