Sayyiduna Anas bin Malik (may Allah be pleased with him) said: I took Abdullah bin Abi Talhah al-Ansari to the Messenger of Allah (peace and blessings be upon him) when he was born, and he (peace and blessings be upon him) was wearing a cloak and applying tar to a camel of his. He (peace and blessings be upon him) asked: "Do you have any dates?" I replied that I did. He (peace and blessings be upon him) took the dates, put them in his mouth and chewed them, then took them out and put them into the child's mouth. The child began to suck on the date, and the Messenger of Allah (peace and blessings be upon him) said: "The Ansar love dates." And he (peace and blessings be upon him) named him Abdullah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19304