Psalm 81

Asaph.   A song/prophecy associated with the Feast of Booths (tabernacles), based on verse 3 and 4.

The psalm begins with a call for exuberant praise to "God our strength"....Singing, joyful shouts and music.  A trumpet blast initiates the feast at the new moon.

The psalmist remembers that God established Joseph in Egypt.....eventually bringing the entire family there for rescue from the famine.

Then, God speaks.

I rescued you from slavery there.  You called to me and I answered!   I brought you out and tested you in the wilderness.  I am your God!   Worship no other!

But you did turn to other gods, and you did not trust Me to satisfy you.    So, I allowed you to go.   How I long for a people who will listen to me and be steadfast and faithful!   I would defeat every for, judge every enemy, and satisfy their every need.  I would feed them with "honey from the rock", and "the finest of wheat".   Both of these phrases appear in the song of Moses in Deut. 32.

(Study notes equate this lament by God to that of Jesus in Matt. 23:37  over Jerusalem)
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I picture God lamenting over me.......longing for me to be steadfast and faithful.....not turning to any other idol for help,comfort, strength, fulfillment, etc.
But I am reminded of His steadfastness and faithfulness to me.  He chose me and keeps me, through no merit of my own....and will never leave me or forsake me, though He will shape me and mold me through various trials and affliction.