What is the interpretation of Psalm 3?

It is about King David's hardship with his son Absalom. King David has ruled Israel for some time, but he now faces a perilous situation. His scheming son Absalom has had himself declared king, and David has been forced to leave Jerusalem. He has also been betrayed by a confidant, and now, accompanied by a few loyal ones, he walks weeping and barefoot over the Mount of Olives. When we read what David wrote at Psalm 3:4,5 we see how confident he was in Jehovah God. We read, "I will call aloud to Jehovah,

And he will answer me from his holy mountain. I will lie down and sleep; And I will wake up in safety, For Jehovah continues to support me"

These psalms assure us that Jehovah is with his faithful servants day and night, blessing them with his support as well as peace and a sense of security. (Psalm 4:8)

(New World Translation of the Holy Scriptures)