Du'a for your children from the Qur'an: Surah Ali 'Imran (38)

رَبِّ هَبۡ لِي مِن لَّدُنكَ ذُرِّيَّةࣰ طَيِّبَةًۖ إِنَّكَ سَمِيعُ ٱلدُّعَآءِ

Rabbi hab lee mil ladunka dhurriyyatan tayyibah, innaka Samee'ud-du'aa'

My Lord! Bestow upon me of Thy bounty goodly offspring. Lo! Thou art the Hearer of Prayer

Qur'an 3:38 (Ali 'Imran)