Musnad Ahmad 26:445

'Abd al-Samad narrated to us, Hammad narrated to us, 'Asim narrated to us, from Abu Wa'il, from Ibn Mas'ud, that the Messenger of Allah (may Allah bless him and grant him peace) addressed the women and said to them: "There is no woman among you who has three [children] die, except that Allah the Almighty and Majestic will cause her to enter Paradise." A woman among them said: "O Messenger of Allah, and the one who has two [children die] is in Paradise?" He said: "And the one who has two is in Paradise."