Bukhari :: Book 2 :: Volume 23 :: Hadith 341
Narrated Abu Sa'id:
The women requested the Prophet, "Please fix a day for us." So the Prophet preached to them and said, "A woman whose three children died would be screened from the Hell Fire by them," Hearing that, a woman asked, "If two died?" The Prophet replied, "Even two (would screen her from the (Hell) Fire. " And Abu Huraira added, "Those children should be below the age of puberty. "
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