Why did none of these believers use the Psalter to praise the Lord on these occasions if that was the requirement and these 150 Psalms are sufficient to praise the Lord with? These examples prove the point that the saints in both Old Testament & New Testament times did not live by this exclusive psalmist rule.
Furthermore, what was the rule prior to the book of Psalms coming into existence? At least one of the Psalms, and possibly more, was penned by Moses. Did the saints before the completion of the Psalter sing their own composition or sing only Moses' psalms?
For Part 1 click here