An Ansari woman, who was among those who pledged allegiance to the Prophet (peace be upon him), says that once the Prophet (peace be upon him) came to Banu Salamah with his noble companions (may Allah be pleased with them). We presented food to the Prophet (peace be upon him). The Prophet (peace be upon him) and his companions (may Allah be pleased with them) ate it. Then we presented water for ablution, and the Prophet (peace be upon him) performed ablution. Turning to his companions (may Allah be pleased with them), he said, "Shall I not tell you about those things which become expiation for sins?" The companions (may Allah be pleased with them) said, "Why not!" The Prophet (peace be upon him) said, "Performing ablution thoroughly despite natural dislike, frequently walking to the mosques, and waiting for the next prayer after performing one prayer."