Ibn Abbas (may Allah be pleased with them both) said that on the road to Makkah a woman lifted up a nursing child from a litter and said: "O Messenger of Allah (peace and blessings be upon him)! Is there Hajj for him?" He (peace and blessings be upon him) said: "Yes, and you will have a reward."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9703