Du'a for your children from the Qur'an: Surah Ibrahim (40)

رَبِّ ٱجۡعَلۡنِي مُقِيمَ ٱلصَّلَوٰةِ وَمِن ذُرِّيَّتِيۚ رَبَّنَا وَتَقَبَّلۡ دُعَآءِ

Rabbi Ajaalney Moqeema Al Salati Wa Men Dhoriyatey Rabbana WaTaqabal Duaa

My Lord! Make me to establish proper worship, and some of my posterity (also); our Lord! and accept my prayer

Qur'an 14:40 (Ibrahim)