John Gill Commentary Psalms 119:48

"I will lift up my hands also unto thy commandments, which I have loved; And I will meditate on thy statutes. ZAYIN." — Psalms 119:48 (ASV)

My hands also will I lift up unto thy commandments, which I
have loved
Showing by such a gesture his great esteem of them, and affection for them; stretching out his hands, and embracing them with both arms, as it were: and this being a praying gesture, (2 Timothy 2:8), may signify his earnest desire and request that he might have grace and spiritual strength to enable him to observe them; and it being used in swearing, (Genesis 14:22), may express his firm resolution in the strength of divine grace to keep them; and the phrase signifying a doing or an attempt to do anything, (Genesis 41:44), may denote his practical observance of the commands, his putting his hand to do them with all his might.

and I will meditate in your statutes ;
and thereby get a better understanding of them, and be in a better disposition and capacity to keep them.