Sayyiduna Abu Sa'id (may Allah be pleased with him) said: Some women gathered, and the Messenger of Allah (peace and blessings be upon him) came to them and taught them some of what Allah had taught him (peace and blessings be upon him). Then he (peace and blessings be upon him) said: "There is no woman among you who sends three of her children ahead of her but they will be a screen (a veil) for her against the Fire of Hell." A woman said: O Messenger of Allah! And if there are two? He (peace and blessings be upon him) said: "Two as well."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7136