"A man said to the Prophet (s.a.w): 'O Messenger of Allah! By Allah! Indeed I love you!' So he said: 'Consider what you say.' He said: 'By Allah! I indeed love you!' Three times. He said: 'If you do love me, then prepare and arm yourself against poverty. For indeed poverty comes faster upon whoever loves me than the flood to its destination.'"
Jami` at-Tirmidhi Book 36, Hadith 47