Psalms 138:5

In the ways. — Rather, of the ways, this preposition being so used frequently after verbs of speaking praising (comp. Psalms 20:7; Psalms 44:8; Psalms 87:3; Psalms 105:2), though there is no parallel instance of such a use with this particular verb sing.

For ways used of God’s mighty works in creation see Job 26:14; Job 40:19; of His action in history, Psalms 18:30; Deuteronomy 32:4. It seems against the parallelism to understand literally that the heathen kings would come to walk in God’s ways — i.e., in righteousness, and so praise Him, as in Micah 4:2. The meaning is that heathen monarchs will be compelled to acknowledge the glory of Jehovah.