John Gill Commentary Psalms 119:16

"I will delight myself in thy statutes: I will not forget thy word. GIMEL." — Psalms 119:16 (ASV)

I will delight myself in your statutes
In looking over them; in meditating on them; in obeying them, and walking according to them; as every good man does delight in the law of the Lord, after the inward man, (Romans 7:22) ; see (Psalms 119:24Psalms 119:92Psalms 119:97) ;

I will not forget your word :
he took all proper methods to fix it in his memory; he laid it up in his mind; he meditated upon it in his heart, and he talked of it with his lips, (Psalms 119:11Psalms 119:13Psalms 119:15) .