Musnad Abu Ya'la al-Mawsili 110:73

And from Ibn ‘Uyaynah, Ibrahim ibn ‘Uqbah narrated to us, from Kurayb, from Ibn ‘Abbas, that a woman brought out a young boy from a litter of hers and said, “O Messenger of Allah, is there Hajj for this one?” He said, “Yes, and you have a reward.”