David
Psalm 118:15ESV·traditional attribution

Glad songs of salvation are in the tents of the righteous: “The right hand of the LORD does valiantly,

John Calvin Reformed @genevareformer

PSALM 118 At the time when this psalm was penned, whenever that was, David having attained to the possession of royal power, and aware that he reigned for the common safety of the Church, calls upon all the children of Abraham to ponder attentively this grace. He also recounts his dangers, the magnitude and variety of which would have slain him a hundred times, had not God wonderfully succored him.

Commenting on Psalm 118:1-29

C.H. Spurgeon Reformed Baptist @princeofpreachers

The voice of rejoicing and salvation is in the tabernacles of the righteous. They sympathised in the delight of their leader and they abode in their tents in peace, rejoicing that one had been raised up who, in the name of the Lord, would protect them from their adversaries. The families of believers are happy, and they should take pains to give their happiness a voice by their family devotion.

Matthew Henry Presbyterian @wholebiblehenry

It appears here, as often as elsewhere, that David had his heart full of the goodness of God. He loved to think of it, loved to speak of it, and was very solicitous that God might have the praise of it and others the comfort of it. The more our hearts are impressed with a sense of God's goodness the more they will be enlarged in all manner of obedience.

Commenting on Psalm 118:1-18