It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that I heard the Prophet (peace and blessings be upon him) say: Once, in a dream, a bowl of milk was brought to me. I drank so much of it that milk began to come out from my fingernails. Then I gave the remainder to Sayyiduna Umar (may Allah be pleased with him). Someone asked: O Messenger of Allah! What interpretation did you give to this? The Prophet (peace and blessings be upon him) said: "Knowledge."