The word(s) "what" appears 597 time(s) in 511 verse(s) in Quran in Muhammad Pickthal translation.

(401) And hath made of service unto you whatsoever is in the heavens and whatsoever is in the earth; it is all from Him. Lo! herein verily are portents for a people who reflect.

(402) Tell those who believe to forgive those who hope not for the days of Allah; in order that He may requite folk what they used to earn.

(403) And Allah hath created the heavens and the earth with truth, and that every soul may be repaid what it hath earned. And they will not be wronged.

(404) And they say: There is naught but our life of the world; we die and we live, and naught destroyeth us save time; when they have no knowledge whatsoever of (all) that; they do but guess.

(405) And thou wilt see each nation crouching, each nation summoned to its record. (And it will be said unto them): This day ye are requited what ye used to do.

(406) And when it was said: Lo! Allah's promise is the truth, and there is no doubt of the Hour's coming, ye said: We know not what the Hour is. We deem it naught but a conjecture, and we are by no means convinced.

(407) And the evils of what they did will appear unto them, and that which they used to deride will befall them.

(408) Say (unto them, O Muhammad): Have ye thought on all that ye invoke beside Allah? Show me what they have created of the earth. Or have they any portion in the heavens? Bring me a scripture before this (Scripture), or some vestige of knowledge (in support of what ye say), if ye are truthful.

(409) Or say they: He hath invented it? Say (O Muhammad): If I have invented it, still ye have no power to support me against Allah. He is Best Aware of what ye say among yourselves concerning it. He sufficeth for a witness between me and you. And He is the Forgiving, the Merciful.

(410) Say: I am no new thing among the messengers (of Allah), nor know I what will be done with me or with you. I do but follow that which is inspired in me, and I am but a plain warner.