Albert Barnes Commentary Psalms 119:133

"Establish my footsteps in thy word; And let not any iniquity have dominion over me." — Psalms 119:133 (ASV)

Order my steps in thy word – My goings, or, my conduct and life – by your word; according to your requirements. Let me be wholly obedient to your will.

And let not any iniquity have dominion over me – See the notes at Psalms 19:13. The prayer is that no form of sin, that no wicked passion or propensity, might be allowed to rule over him. He who is willing that any one sin should rule in his heart, though he should be free from all other forms of sin, cannot be a pious man. See the notes at James 2:10.