Hadith 1277:4
Ya'la and Muhammad narrated to us, they said: Uthman ibn Hakim narrated to us, from 'Amr al-Ansari, from Umm Sulaym bint Milhan—and she is the mother of Anas ibn Malik—(Muhammad said: he informed her), she said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There are no two Muslims whose three children die before reaching the age of puberty, except that Allah will cause them both to enter Paradise by the grace of His mercy." He said it three times. It was said: "O Messenger of Allah, and two?" He said: "And two."
حدثنا يعلى، ومحمد، قالا: حدثنا عثمان بن حكيم، عن عمرو الأنصاري، عن أم سليم بنت ملحان، وهي أم أنس بن مالك - قال: محمد أخبرته - قالت: قال رسول الله صلى الله عليه وسلم: " ما من مسلمين يموت لهما ثلاثة أولاد لم يبلغوا الحنث إلا أدخلهما الله الجنة بفضل رحمته " قالها ثلاثا، قيل يا رسول الله واثنان؟ قال: " واثنان "