Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Darda (may Allah be pleased with him) narrates that when the time of his death approached, he said: I am relating to you a hadith which I myself heard from the Prophet (peace and blessings of Allah be upon him). The Messenger of Allah (peace and blessings of Allah be upon him) said: “Worship Allah as if you see Him, and if you do not see Him, then surely He sees you. And consider yourself among the dead. And beware of the supplication of the oppressed, for it is accepted. And whoever can come to the ‘Isha and Fajr prayers, let him come, even if he has to crawl.”

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: The Messenger (peace and blessings of Allah be upon him) took hold of a part of my body and said: "Worship Allah as if you see Him, and be in this world as if you are a stranger or a traveler."

Sayyiduna Mu’adh (may Allah be pleased with him) says: I said, “O Messenger of Allah! Advise me.” He (peace and blessings be upon him) said: “Worship Allah as if you see Him, consider yourself among the dead, remember Allah at every stone and tree, and whenever you commit an evil deed, follow it up immediately with a good deed (so that the effect of the evil is erased); for a hidden evil, do a hidden good deed, and for an open evil, do an open good deed.”