John Gills Exposition of the Bible Commentary - Psalms 144:9
I will sing a new song unto thee, O God ,.... The author of his being, the Father of mercies, temporal and spiritual, and therefore to him praise is always due; a new song of praise is to be sung for new mercies; and as these are new every morning, and are renewed day by day, new songs should be sung continually: or this is a song suited to New Testament times, in which all things are become new; there is a new covenant of grace; and a new and living way to the throne of grace; a newly slain... read more
Matthew Henry's Complete Commentary - Psalms 144:9-15
The method is the same in this latter part of the psalm as in the former; David first gives glory to God and then begs mercy from him. I. He praises God for the experiences he had had of his goodness to him and the encouragements he had to expect further mercy from him, Ps. 144:9, 10. In the midst of his complaints concerning the power and treachery of his enemies, here is a holy exultation in his God: I will sing a new song to thee, O God! a song of praise for new mercies, for those... read more