Narrated As-Sa'ib bin Yazid:

(While in the company of my parents) I was made to perform Hajj with Allah's Apostle and I was a seven-year-old boy then. (Fatch-Al-Bari, p.443, Vol.4)

حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ يُونُسَ، حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ، عَنْ مُحَمَّدِ بْنِ يُوسُفَ، عَنِ السَّائِبِ بْنِ يَزِيدَ، قَالَ حُجَّ بِي مَعَ رَسُولِ اللَّهِ ﷺ وَأَنَا ابْنُ سَبْعِ سِنِينَ.