On the authority of Jurthum bin Nashir that the Messenger of Allah, salla Allah u alihi wa sallam, said :

"Allah the Almighty has laid down religious duties, so do not neglect them. He has set boundaries, so do not over step them. He has prohibited some things, so do not violate them; about some things He was silent-out of compassion for you, not forgetfulness, so seek not after them."