The Prophet (ﷺ) came upon a woman who was weeping for her child. He said to her: Fear Allah and have patience. She said: What have you to do with my calamity ? She was then told that he was the Prophet (ﷺ). She, therefore, came to him. She did not find doorkeepers at his gate. She said: I did not recognize you, Messenger of Allah. He said: Endurance is shown only at a first blow.

Sunan Abi Dawud Book 21, Hadith 36