The word(s) "which" appears 609 time(s) in 551 verse(s) in Quran in Abdullah Yusuf Ali translation.

(171) He said: "I only complain of my distraction and anguish to Allah, and I know from Allah that which ye know not...

(172) Then when the bearer of the good news came, He cast (the shirt) over his face, and he forthwith regained clear sight. He said: "Did I not say to you, 'I know from Allah that which ye know not?'"

(173) Such is one of the stories of what happened unseen, which We reveal by inspiration unto thee; nor wast thou (present) with them then when they concerted their plans together in the process of weaving their plots.

(174) A. L. M. R. These are the signs (or verses) of the Book: that which hath been revealed unto thee from thy Lord is the Truth; but most men believe not.

(175) He knoweth the unseen and that which is open: He is the Great, the Most High.

(176) He sends down water from the skies, and the channels flow, each according to its measure: But the torrent bears away to foam that mounts up to the surface. Even so, from that (ore) which they heat in the fire, to make ornaments or utensils therewith, there is a scum likewise. Thus doth Allah (by parables) show forth Truth and Vanity. For the scum disappears like forth cast out; while that which is for the good of mankind remains on the earth. Thus doth Allah set forth parables.

(177) Is then one who doth know that that which hath been revealed unto thee from thy Lord is the Truth, like one who is blind? It is those who are endued with understanding that receive admonition;-

(178) Those who join together those things which Allah hath commanded to be joined, hold their Lord in awe, and fear the terrible reckoning;

(179) But those who break the Covenant of Allah, after having plighted their word thereto, and cut asunder those things which Allah has commanded to be joined, and work mischief in the land;- on them is the curse; for them is the terrible home!

(180) Allah doth enlarge, or grant by (strict) measure, the sustenance (which He giveth) to whomso He pleaseth. (The wordly) rejoice in the life of this world: But the life of this world is but little comfort in the Hereafter.