Abu Hurairah reported,

I went out with the Messenger of Allah ﷺ during part of the day. He did not speak to me, nor did I speak to him, until he arrived at the market of Banu Qaynuqa. Then he turned back and came to the dwelling of Fatimah and said, "Is the little one here? Is the little one here?" meaning Hasan.We thought his mother was keeping him back to wash him and dress him in a necklace of beads. It was not long before he came running, and each of them embraced the other.The Messenger of Allah ﷺ then said, "O Allah, I love him, so love him, and love whoever loves him."

عن أبي هريرة قال

خرجت مع رسول الله ﷺ في طائفة من النهار، لا يكلمني ولا أكلمه، حتى جاء سوق بني قينقاع، ثم انصرف، حتى أتى خباء فاطمة فقال: أثم لكع، أثم لكع؟ يعني حسنا، فظننا أنه إنما تحبسه أمه لأن تغسله وتلبسه سخابا، فلم يلبث أن جاء يسعى، حتى اعتنق كل واحد منها صاحبه، فقال رسول الله ﷺ: اللهم إني أحبه فأحبه، وأحبب من يحبه.