Albert Barnes Commentary Psalms 78:61

"And delivered his strength into captivity, And his glory into the adversary`s hand." — Psalms 78:61 (ASV)

And delivered his strength into captivity - That is, the ark, considered as the symbol of his power. This constituted the defense of the people; this was the emblem of the presence of God, which, when with them, was their real protection. The allusion here is to the time when the ark was taken by the Philistines in the days of Eli. See 1 Samuel 4:3–11.

And his glory - That which was emblematic of his glory, that is, the ark.

Into the enemy’s hand - The hand or power of the Philistines.