Albert Barnes Commentary Psalms 30:1

"I will extol thee, O Jehovah; for thou hast raised me up, And hast not made my foes to rejoice over me." — Psalms 30:1 (ASV)

I will extol you - literally, “I will exalt you”; that is, he would make God first and supreme in his thoughts and affections; he would do what he could to make Him known; he would elevate Him high in his praises.

For you have lifted me up - that is, from the state of danger in which I was (Psalms 30:2–3). The Hebrew word used here means properly to draw out, as from a well; and then, to deliver, to set free. As God had thus lifted him up, it was proper that he should show his gratitude by “lifting up” or extolling the name of God.

And have not made my foes to rejoice over me - You have not allowed them to triumph over me; that is, you have delivered me from them. He refers to the fact that he had been saved from a dangerous illness, and that his enemies had not been allowed to exult over his death. .