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

(11) O ye who believe! Remember Allah's favour unto you, how a people were minded to stretch out their hands against you but He withheld their hands from you; and keep your duty to Allah. In Allah let believers put their trust.

(12) Then out spake two of those who feared (their Lord, men) unto whom Allah had been gracious: Enter in upon them by the gate, for if ye enter by it, lo! ye will be victorious. So put your trust (in Allah) if ye are indeed believers.

(13) Those are they unto whom We gave the Scripture and command and prophethood. But if these disbelieve therein, then indeed We shall entrust it to a people who will not be disbelievers therein.

(14) We should have invented a lie against Allah if we returned to your religion after Allah hath rescued us from it. It is not for us to return to it unless Allah our Lord should (so) will. Our Lord comprehendeth all things in knowledge. In Allah do we put our trust. Our Lord! Decide with truth between us and our folk, for Thou art the best of those who make decision.

(15) And when the terror fell on them they cried: O Moses! Pray for us unto thy Lord, because He hath a covenant with thee. If thou removest the terror from us we verily will trust thee and will let the Children of Israel go with thee.

(16) They only are the (true) believers whose hearts feel fear when Allah is mentioned, and when His revelations are recited unto them they increase their faith, and who trust in their Lord;

(17) O ye who believe! Betray not Allah and His messenger, nor knowingly betray your trusts.

(18) When the hypocrites and those in whose hearts is a disease said: Their religion hath deluded these. Whoso putteth his trust in Allah (will find that) lo! Allah is Mighty, Wise.

(19) And if they incline to peace, incline thou also to it, and trust in Allah. Lo! He, even He, is the Hearer, the Knower.

(20) Say: Naught befalleth us save that which Allah hath decreed for us. He is our Protecting Friend. In Allah let believers put their trust!