Verses with the word rust in the New Testament (3 verses):

Matthew 6:19
Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and where thieves break through and steal:

Matthew 6:20
But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:

James 5:3
Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days.