دَعْ مَا يَرِيبُكَ إِلَى مَا لَا يَرِيبُكَ
Leave what makes you doubtful for what does not make you doubtful.
Source: أحمد والترمذي
دَعْ is a singular imperative meaning “leave.” مَا يَرِيبُكَ describes what causes reasonable doubt; إِلَى مَا لَا يَرِيبُكَ points toward what is clearer and free of that doubt. The attached ـكَ means “you.”
The instruction encourages choosing a trustworthy and clearer course when a meaningful doubt arises. It should not be turned into a rule that every passing fear or baseless suspicion requires abandoning otherwise legitimate actions.