Verily, Ibrahīm is my son and he died as a suckling infant, and, verily, he has two wet nurses in Paradise completing his suckling period

Anas ibn Mālik (may Allah be pleased with him) reported that he had never seen anyone more merciful to children than the Messenger of Allah (may Allah's peace and blessings be upon him). His son, Ibrahīm, was suckled by a wet nurse living in the suburb of Madīnah. Hence, he used to go there with some of his Companions to visit his son. He used to enter the house that would be filled with smoke because the wet nurse's husband was a blacksmith.

He would take Ibrahīm, kiss him and then return home. On Ibrahīm's death, the Messenger of Allah (may Allah's peace and blessings be upon him) said: Ibrahīm is my son, and he died as a suckling infant, and he has two wet nurses in Paradise to complete his suckling period until he reaches the age of two. Ibrahīm died when he was sixteen or seventeen months old. So, he was to be suckled until completing the suckling period, which is two years according to what is stated in the Qur'an.

This was done to honor the Prophet (may Allah's peace and blessings be upon him) and his son.