Hazrat Abu Hurairah (may Allah be pleased with him) narrated that the Noble Prophet (peace and blessings of Allah be upon him) said: If someone’s three children die, he will not enter Hell, and if he does enter, it will be only to fulfill an oath.

Abu Sa'id Al-Khudri (may Allah be pleased with him) narrated that a woman came to the Prophet (peace and blessings be upon him) and said, "O Messenger of Allah! All your sayings are taken by the men. Please specify a day for us from your side so that we may come to you and you teach us what Allah has taught you." The Prophet (peace and blessings be upon him) said, "Then gather on such-and-such day at such-and-such place." So the women gathered, and the Prophet (peace and blessings be upon him) came to them and taught them what Allah had taught him. Then he said, "Any woman among you who sends ahead three of her children (i.e., they die in her lifetime), they will become a barrier for her from the Fire." Upon this, one of the women said, "O Messenger of Allah! (What about) two (children)?" Abu Sa'id Al-Khudri (may Allah be pleased with him) narrated that the woman repeated this word twice, then the Prophet (peace and blessings be upon him) said, "Two, two, two also have the same status."

Abdur Rahman bin Al-Asbahani Zakwan from Abu Sa'id, and Abu Sa'id Al-Khudri (may Allah be pleased with him) narrates this same hadith from the Messenger of Allah (peace and blessings be upon him). And (in another chain) Abdur Rahman Al-Asbahani says that I heard from Abu Hazim, who narrates from Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Three (children) who have not yet reached puberty..."