"A woman held a boy of hers up for the Messenger of Allah and said: 'O Messenger of Allah! Is there Hajj for this one' He said: 'Yes, and you will be rewarded.'"  

رَفَعَتِ امْرَأَةٌ صَبِيًّا لَهَا إِلَى رَسُولِ اللَّهِ ﷺ فَقَالَتْ يَا رَسُولَ اللَّهِ أَلِهَذَا حَجٌّ قَالَ نَعَمْ وَلَكِ أَجْرٌ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ حَدِيثُ جَابِرٍ حَدِيثٌ غَرِيبٌ  

"My father took me for Hajj with the Messenger of Allah during the Farewell Hajj, and I was seven years old."  

حَجَّ بِي أَبِي مَعَ رَسُولِ اللَّهِ ﷺ فِي حَجَّةِ الْوَدَاعِ وَأَنَا ابْنُ سَبْعِ سِنِينَ  

From the Prophet, with similar (Hadith of Muhammad bin Tarif no. 924).  

عَنِ النَّبِيِّ ﷺ نَحْوَهُ يَعْنِي حَدِيثَ مُحَمَّدِ بْنِ طَرِيفٍ