إِذَا لَمْ تَسْتَحِ، فَاصْنَعْ مَا شِئْتَ
Translation: If you have no sense of modesty, then do whatever you wish.
Source: البخاري
لَمْ تَسْتَحِ means “you have no sense of modesty,” فَاصْنَعْ “then do,” and مَا شِئْتَ “whatever you wish.” Although the wording resembles a command, in context it is a grave warning about shameless behavior, not permission to do wrong.
Modesty is the moral quality that restrains wrongdoing. It does not mean refusing to ask sincere questions, learn essential matters, or seek one’s lawful rights. The concern is character, not mere social shyness.