The word(s) "rust" appears 85 time(s) in 71 verse(s) in Quran in Muhammad Pickthal translation.

(51) And incline not to the disbelievers and the hypocrites. Disregard their noxious talk, and put thy trust in Allah. Allah is sufficient as Trustee.

(52) Lo! We offered the trust unto the heavens and the earth and the hills, but they shrank from bearing it and were afraid of it. And man assumed it. Lo! he hath proved a tyrant and a fool.

(53) Lo! this my brother hath ninety and nine ewes while I had one ewe; and he said: Entrust it to me, and he conquered me in speech.

(54) And verily, if thou shouldst ask them: Who created the heavens and the earth? they will say: Allah. Say: Bethink you then of those ye worship beside Allah, if Allah willed some hurt for me, could they remove from me His hurt; or if He willed some mercy for me, could they restrain His mercy? Say: Allah is my all. In Him do (all) the trusting put their trust.

(55) Through boiling waters; then they are thrust into the Fire.

(56) And in whatsoever ye differ, the verdict therein belongeth to Allah. Such is my Lord, in Whom I put my trust, and unto Whom I turn.

(57) Now whatever ye have been given is but a passing comfort for the life of the world, and that which Allah hath is better and more lasting for those who believe and put their trust in their Lord,

(58) The day when they are thrust with a (disdainful) thrust, into the fire of hell

(59) Believe in Allah and His messenger, and spend of that whereof He hath made you trustees; and such of you as believe and spend (aright), theirs will be a great reward.

(60) And he who findeth not (the wherewithal), let him fast for two successive months before they touch one another; and for him who is unable to do so (the penance is) the feeding of sixty needy ones. This, that ye may put trust in Allah and His messenger. Such are the limits (imposed by Allah); and for disbelievers is a painful doom.