The word(s) "know" appears 656 time(s) in 561 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) So if they believe as ye believe, they are indeed on the right path; but if they turn back, it is they who are in schism; but Allah will suffice thee as against them, and He is the All-Hearing, the All-knowing.

(22) Or do ye say that Abraham, Isma'il, Isaac, Jacob and the Tribes were Jews or Christians? Say: Do ye know better than Allah? Ah! who is more unjust than those who conceal the testimony they have from Allah? but Allah is not unmindful of what ye do!

(23) We see the turning of thy face (for guidance to the heavens: now Shall We turn thee to a Qibla that shall please thee. Turn then Thy face in the direction of the sacred Mosque: Wherever ye are, turn your faces in that direction. The people of the Book know well that that is the truth from their Lord. Nor is Allah unmindful of what they do.

(24) Even if thou wert to bring to the people of the Book all the Signs (together), they would not follow Thy Qibla; nor art thou going to follow their Qibla; nor indeed will they follow each other's Qibla. If thou after the knowledge hath reached thee, Wert to follow their (vain) desires,-then wert thou Indeed (clearly) in the wrong.

(25) The people of the Book know this as they know their own sons; but some of them conceal the truth which they themselves know.

(26) A similar (favour have ye already received) in that We have sent among you a Messenger of your own, rehearsing to you Our Signs, and sanctifying you, and instructing you in Scripture and Wisdom, and in new knowledge.

(27) Behold! Safa and Marwa are among the Symbols of Allah. So if those who visit the House in the Season or at other times, should compass them round, it is no sin in them. And if any one obeyeth his own impulse to good,- be sure that Allah is He Who recogniseth and knoweth.

(28) For he commands you what is evil and shameful, and that ye should say of Allah that of which ye have no knowledge.

(29) If anyone changes the bequest after hearing it, the guilt shall be on those who make the change. For Allah hears and knows (All things).

(30) Permitted to you, on the night of the fasts, is the approach to your wives. They are your garments and ye are their garments. Allah knoweth what ye used to do secretly among yourselves; but He turned to you and forgave you; so now associate with them, and seek what Allah Hath ordained for you, and eat and drink, until the white thread of dawn appear to you distinct from its black thread; then complete your fast Till the night appears; but do not associate with your wives while ye are in retreat in the mosques. Those are Limits (set by) Allah: Approach not nigh thereto. Thus doth Allah make clear His Signs to men: that they may learn self-restraint.