C. F. Keil and Franz Delitzsch on Isaiah 31:7

Isa 31:7

The first is, that idolatry would one day be recognised in all its abomination, and put away. “For in that day they will abhor every one their silver idols and their gold idols, which your hands have made you for a sin,” i.e., to commit sin and repent, with the preponderance of the latter idea, as in Hos 8:11 (compare 1Ki 13:34). חטא, a second accusative to עשׂוּ, indicating the result. The prospect is the same as that held out in Isa 30:22; Isa 27:9; Isa 17:8; Isa 2:20.