Psalm 119.48 I will lift up my hands toward your commandments, which I love, and I will meditate on your statutes.
It may be a little unclear as to David's intention to raise his hands towards God's commandments, but I think it's about raising his hands to grasp the word of God. He says he loves God and wants to reflect on God's precepts. That is why he wants to raise his hands to lay hold on the word of God and not let it go. He loves God and will meditate on the word to understand God's plan and will.