Psalms 116:7

Return unto thy rest, O my soul; for the LORD hath dealt bountifully with thee.

The verse is the soul speaking to itself, calling itself back to its rest, and the reason given for that return is that the Lord has dealt bountifully with it. It is a song of trust, expressing confidence in God's goodness and in His help. Jesus Himself sang it as part of that song of trust. He sang it on the night before His betrayal and death.