In the Quran

رَبَّنَا وَٱجۡعَلۡنَا مُسۡلِمَيۡنِ لَكَ وَمِن ذُرِّيَّتِنَآ أُمَّةٗ مُّسۡلِمَةٗ لَّكَ وَأَرِنَا مَنَاسِكَنَا وَتُبۡ عَلَيۡنَآۖ إِنَّكَ أَنتَ ٱلتَّوَّابُ ٱلرَّحِيمُ

"Our Lord, and make us Muslims [in submission] to You and from our descendants a Muslim nation [in submission] to You. And show us our rites and accept our repentance. Indeed, You are the Accepting of repentance, the Merciful"