Verses with the word operation in the Old Testament (2 verses):

Psalms 28:5
Because they regard not the works of the LORD, nor the operation of his hands, he shall destroy them, and not build them up.

Isaiah 5:12
And the harp, and the viol, the tabret, and pipe, and wine, are in their feasts: but they regard not the work of the LORD, neither consider the operation of his hands.