John Dummelow's Commentary on the Bible - 2 Samuel 22:1-51
David’s Thanksgiving PsalmThis beautiful poem has also been preserved as the Eighteenth Psalm. It probably belongs to the earlier portion of David’s reign, when his conquests and God’s promise (2 Samuel 7) were still fresh in his mind. See on Psalms 18. read more
Expository Notes of Dr. Thomas Constable - 2 Samuel 22:1-51
C. David’s Praise of Yahweh ch. 22"It has long been recognized that 2 Samuel 22 is not only one of the oldest major poems in the OT but also that, because Psalms 18 parallels it almost verbatim, it is a key passage for the theory and practice of OT textual criticism." [Note: Youngblood, p. 1064.] This psalm records David’s own expression of the theological message the writer of Samuel expounded historically. Yahweh is King, and He blesses those who submit to His authority in many ways. 2 Samuel... read more