Psalms 42:8 [Yet] the LORD will command his lovingkindness in the daytime, and in the night his song [shall be] with me, [and] my prayer unto the God of my life.
Ver. 8. Yet the Lord will command his lovingkindness] He will after all this misery send forth a commission and a command to set me free; and his mandamus command will do it at any time.
And in the night his song shall be with me] When others that are without God in the world have restless nights, the gnats of cares and griefs molesting them, a saint can sing away care, and call his soul to rest, as Psalms 116:7, being filled with peace and joy through believing; such as setteth him a singing to God's glory.
And my prayer unto the God of my life] i.e. My praises, which are a chief part of prayer, 1 Timothy 6:1. Thanksgiving is an artificial begging, Gratiarum actio est ad plus dandum invitatio.