INTRODUCTION TO PSALM 100 A Psalm of Praise. The Arabic version ascribes this psalm to David, and very likely it is one of his: the Targum calls it "a hymn for the sacrifice of thanksgiving;'' and so Jarchi. It is supposed to have been used when peace offerings for thanksgivings were offered up, Lev 7:11. The Syriac inscription is very odd; "concerning Joshua the son of Nun, when he made the war of the Ammonites to cease;'' though it more rightly adds, "but in the New Testament, when the Gentiles are converted to the faith:'' and indeed the scope of the psalm is to exhort the Gentiles to praise the Messiah, to serve and worship him, from the consideration of his goodness and mercy, truth and faithfulness.