Allah's Messenger (ﷺ) said, "While I was sleeping, some people were displayed before me (in a dream). They were wearing shirts, some of which were merely covering their breasts, and some a bit longer. Then there passed before me, `Umar bin Al-Khattab wearing a shirt he was dragging it (on the ground behind him.)" They (the people) asked, "What have you interpreted (about the dream) O Allah's Apostle?" He said, "The Religion."
Sahih al-Bukhari Book 91, Hadith 26
← Previous Hadith Allah's Messenger (ﷺ) said, "While I was sleeping, I was given a bowl full of milk (in the dream) and I drank from it (to my fill) till I noticed its wetness coming out of my limbs. Then I gave the rest of it to `Umar bin Al-Khattab." The persons sitting around him, asked, "What have you interpreted (about the dream) O Allah's Messenger (ﷺ)?" He said, "(It is religious) knowledge."

Sahih al-Bukhari Book 91, Hadith 25 Next Hadith → I heard Allah's Messenger (ﷺ) saying, "While I was sleeping, I saw (in a dream) the people being displayed before me, wearing shirts, some of which (were so short that it) reached as far as their breasts and some reached below that. Then `Umar bin Al-Khattab was shown to me and he was wearing a shirt which he was dragging (behind him)." They asked. What have you interpreted (about the dream)? O Allah's Messenger (ﷺ)?" He said, "The religion."

Sahih al-Bukhari Book 91, Hadith 27