Dua for Doubts in Faith (Invocations for if you are stricken by doubt in your faith, 1 of 3)

يَسْتَعِيذُ بِاللَّهِ و يَنْتَهِي عَمَّا شك فِيهِ

Say: I seek refuge in Allah. Then you should desist from doing what you are in doubt about.