A man asked the Prophet Muhammad (peace be upon him), "O Messenger of Allah! Tell me about a deed that will admit me to Paradise..." Then the narrator mentioned the entire hadith and said: When people are present, protect their water-drawing vessels, and when they are absent (even if they have left), then pick them up and deliver them to them.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23126