Albert Barnes Commentary Psalms 119:146

"I have called unto thee; save me, And I shall observe thy testimonies." — Psalms 119:146 (ASV)

I cried unto thee - I called upon you in trouble.

Save me, and I shall keep thy testimonies - Margin, “That I may keep.” The correct rendering is, “I will keep.”

The idea is that if God would interpose and save him, he would henceforth faithfully keep the law of God. It is one of the designs of affliction to lead people to make such vows as this.

They are commonly made on beds of sickness, alike by the religious and the irreligious; the saint and the sinner. How often, alas, are they forgotten even by the friends of God! How seldom are they remembered at all by the sinner when he is raised up from the verge of the grave, and restored again to health!