The author of this psalm is a captured harpist. They are headed towards Babylon after Zion fell. Which time we can’t know. As they stopped for water, he and his fellow harpist wept openly at the destruction of Jerusalem. And with good reason. The city of Light and the temple of God were left behind. That’s enough to make anyone sorrowful!
When they arrived at the 2 rivers (on their way to Babylon), they hung up their harps on the willows and did not how to sing praises in a strange land. We all often suffer from a similar plight. We put our voices and don’t speak of the Lord when we are not in our comfortable places. The Lord is meant to be shared with all, not just with those who already know Him. Let us not forget the Glory of God ever even if we do a poor job of sharing the blessings of God we have received. Our imperfections are many and are sins are endless. Yet, Christ saves us every time.
In our journey with God, our first love is to be Him. Jerusalem and Zion over all else. Verse 6 says it better than I can. “If I do not remember you, let my tongue cleave to the roof of my mouth; if I prefer not Jerusalem above my chief joy.” Our chief joy should be the Lord and His Word. Do not fall in the traps of Babylon (man). The false Gods and unnecessary things we do to be accepted culturally. Give us guidance so we may raise above the fray and seek You, Lord, always.