Mishkat al-Masabih #528

‘Ubada b. as-Samit reported God’s Messenger as saying, “Five times of prayer have been prescribed by God. If anyone performs the ablution for them well, observes them at their proper time, and perfectly performs the bowing and showing of submissiveness during them, he has a covenant from God to forgive him; but if anyone does not do so, he has no covenant. If He wills He may forgive him, but if He wills He may punish him.” Ahmad and Abu Dawud transmitted it, and Malik and Nasa’i transmitted something similar.