It was narrated that Zirr bin Hubaish said, “I went to Safwan bin ‘Assal Al-Muradi and he said, ‘What brought you here?’ I said, ‘I am seeking knowledge.’ He said, ‘I heard the Messenger of Allah say, “There is no one who goes out of his house in order to seek knowledge, but the angels lower their wings in approval of his action.'”

(Ibn Majar)