الكافي 2/1/66/9

9. Ibn Mahbub has narrated from abu ‘Usamah who has said the following: “Abu ‘Abd Allah عليه السلام has said, ‘The believer is not tried with anything more difficult than three depriving things.’ It was asked, ‘What are they?’ The Imam said, ‘They are to cooperate with one who has an established relation with you with whatever financial means available, to yield to justice for people against one’s own soul and to speak of and remember Allah very often. I, however, do not mean thereby saying, ‘All glory belongs to Allah, all praise belongs to Allah, and no one deserves to be worshipped except Allah. Speaking of Allah, and remembering Him is to do so (remember Him) when facing something that He has made lawful or that He has prohibited.’”