It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that he said: O Messenger of Allah! When I see you, my heart is gladdened and my eyes are cooled; so tell me about everything. He (peace and blessings be upon him) said: "Everything was created from water." He said: I said: Tell me of a deed by which, if I do it, I will enter Paradise. He (peace and blessings be upon him) said: "Spread the greeting of peace, feed others, maintain ties of kinship, and stand (in worship) at night while people are asleep; then enter Paradise in peace." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.