I am the LORD your God, which brought you out of the land of Egypt, to be your God: I am the LORD your God.

Wesley's Notes

15:41 I am the Lord your God - Though I am justly displeased with you for your frequent rebellions, for which also I will keep you forty years in the wilderness, yet I will not utterly cast you off, but will continue to be your God.

Jamieson-Fausset-Brown Bible Commentary

41. I am the Lord your God-The import of this solemn conclusion is, that though He was displeased with them for their frequent rebellions, for which they would be doomed to forty years' wanderings, He would not abandon them but continue His divine protection and care of them till they were brought into the land of promise.

Matthew Henry's Concise Commentary

15:37-41 The people are ordered by the Lord to make fringes on the borders of their garments. The Jews were distinguished from their neighbours in their dress, as well as in their diet, and thus taught not to be conformed to the way of the heathen in other things. They proclaimed themselves Jews wherever they were, as not ashamed of God and his law. The fringes were not appointed for trimming and adorning their clothes, but to stir up their minds by way of remembrance, 2Pe 3:1. If they were tempted to sin, the fringe would warn them not to break God's commandments. We should use every means of refreshing our memories with the truths and precepts of God's word, to strengthen and quicken our obedience, and arm our minds against temptation. Be holy unto your God; cleansed from sin, and sincerely devoted to his service; and that great reason for all the commandments is again and again repeated, I am the Lord your God.