The word(s) "knowest" appears 15 time(s) in 14 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) None of Our revelations do We abrogate or cause to be forgotten, but We substitute something better or similar: knowest thou not that Allah Hath power over all things?

(2) knowest thou not that to Allah belongeth the dominion of the heavens and the earth? And besides Him ye have neither patron nor helper.

(3) Behold! a woman of 'Imran said: "O my Lord! I do dedicate unto Thee what is in my womb for Thy special service: So accept this of me: For Thou hearest and knowest all things."

(4) knowest thou not that to Allah (alone) belongeth the dominion of the heavens and the earth? He punisheth whom He pleaseth, and He forgiveth whom He pleaseth: and Allah hath power over all things.

(5) One day will Allah gather the messengers together, and ask: "What was the response ye received (from men to your teaching)?" They will say: "We have no knowledge: it is Thou Who knowest in full all that is hidden."

(6) And behold! Allah will say: "O Jesus the son of Mary! Didst thou say unto men, worship me and my mother as gods in derogation of Allah'?" He will say: "Glory to Thee! never could I say what I had no right (to say). Had I said such a thing, thou wouldst indeed have known it. Thou knowest what is in my heart, Thou I know not what is in Thine. For Thou knowest in full all that is hidden.

(7) Certain of the desert Arabs round about you are hypocrites, as well as (desert Arabs) among the Medina folk: they are obstinate in hypocrisy: thou knowest them not: We know them: twice shall We punish them: and in addition shall they be sent to a grievous penalty.

(8) They said: "Well dost thou know we have no need of thy daughters: indeed thou knowest quite well what we want!"

(9) Moses said, "Thou knowest well that these things have been sent down by none but the Lord of the heavens and the earth as eye-opening evidence: and I consider thee indeed, O Pharaoh, to be one doomed to destruction!"

(10) "Lord of the heavens and of the earth, and of all that is between them; so worship Him, and be constant and patient in His worship: knowest thou of any who is worthy of the same Name as He?"