John Calvin on Deuteronomy 32:3

3 Because I will publish the name of the Lord. He signifies by these words that, if there were any spark of piety in the Israelites, it must be manifested by their welcoming this address, wherein the majesty of God shines forth. The first clause of the verse, therefore, stands last in order, since it is an assignment of a reason for the other. For when he exhorts them that they should ascribe to God the glory He deserves, he inculcates upon them obedience and attention, as if he had said that, unless they reverently submit themselves to his teaching, God would be defrauded of this due honor; and this he confirms by adding as a reason that he will sincerely and faithfully publish the name of God. For the word invoke Hebr. אקרא A.V., “I will publish,” from קרא, which is stated by Taylor to signify, in its first sense, ”Vocare, advocare, eonvocare, invocare, clamare, exclamare, legere.” — Concord, in voce. is not used here as in many other passages, but is equivalent to making a profession of God. Moses, then, declares himself to be His proclaimer, in order that, under cover of His most Holy name, he may awaken attention to his words.