Mukhtasar Bukhari

Narrated from Sayyiduna Abu Musa (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "My example and the example of what Allah has sent me with is like that of a person who came to a people and said: I have seen with my own eyes that an enemy army is coming, and I am clearly warning you to save yourselves from it, save yourselves from it. A group accepted his word and left that place during the night, so they were saved. But another group did not accept his word; in the morning, the army arrived and destroyed them."