The worship of the calf is the fourth instance (vv. 19-23) in the narrative of which the psalmist follows Exod. xxxii., but seems also to have Deut. ix. 8-12 floating in his mind, as appears from the use of the name "Horeb," which is rare in Exodus and frequent in Deuteronomy. Ver. 20 is apparently modelled on Jer. ii. 11: "My people have changed their glory for that which doth not profit." Compare also Paul's "_changed_ the _glory_ of the incorruptible God for the _likeness_," etc. (Rom. i. 23). "His glory" is read instead "their glory" by Noldeke, Graetz, and Cheyne, following an old Jewish authority. The LXX., in Codd. Alex. and Sin. (second hand), has this reading, and Paul seems to follow it in the passage just quoted. It yields a worthy meaning, but the existing text is quite appropriate. It scarcely means that God was the source of Israel's glory or their boast, for the word is not found in that sense. It is much rather the name for the collective attributes of the revealed Godhead, and is here substantially equivalent to "their God," that lustrous Light which, in a special manner, belonged to the people of revelation, on whom its first and brightest beams shone. The strange perverseness which turned away from such a radiance of glory to bow down before an idol is strikingly set forth by the figure of bartering it for an image, and that of an ox that ate grass. The one true Substance given away for a shadow! The lofty Being whose light filled space surrendered: and for what? A brute that had to feed, and that on herbage! Men usually make a profit, or think they do, on their barter: but what do they gain by exchanging God for anything? Yet _we_ keep making the same mistake of parting with Substance for shadows. And the reason which moved Israel is still operative. As before, the psalmist traces their mad apostasy to forgetfulness of God's deeds. The list of these is now increased by the addition of those at the Red Sea. With every step new links were added to the chain that should have bound the recipients of so many mercies to God. Therefore each new act of departure was of a darker hue of guilt, and drew on the apostates severer punishment, which also, rightly understood, was greater mercy. "He said that He would annihilate them" is quoted from Deut. ix. 25. Moses' intercession for the people is here most vividly represented under the figure of a champion, who rushes into the breach by which the enemy is about to pour into some beleaguered town, and with his own body closes the gap and arrests the assault (cf. Ezek. xxii. 30).