Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) was travelling on the road to Makkah when a woman spoke to him ((peace and blessings be upon him)) from her litter (howdah). She took hold of a child's upper arm, lifted him up and said: "O Messenger of Allah! Is there Hajj for this one?" He ((peace and blessings be upon him)) said: "He will have Hajj, and you will have a reward."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12125