Matthew Henry on Psalms 68:22-28

The victories with which God blessed David over the enemies of Israel, are types of Christ's victory, for himself and for all believers. Those who take him for theirs, may see him acting as their God, as their King, for their good, and in answer to their prayers; especially in and by his word and ordinances. The kingdom of the Messiah shall be submitted to by all the rulers and learned in the world. The people seem to address the king, verse 28. But the words are applicable to the Redeemer, to his church, and every true believer. We pray, that thou, O God the Son, wilt complete thine undertaking for us, by finishing thy good work in us.