(7) Thou calledst.--The recital of God's past dealings with the people usual at the Feast of the Tabernacles (Deuteronomy 31:10-13; Nehemiah 8:18) appears to follow here as if the feast were actually in progress and the crowd were listening to the psalmist.

I answered thee in the secret place of thunder.--Mr. Burgess is undoubtedly right in taking the verb as from ?nan, "to cover," instead of ?nah, "to answer." I sheltered thee in the thundercloud, with plain allusion to the "cloudy pillar." The same verb is used in Psalm 105:39, "He spread out the cloud for a covering."

Verse 7. - Thou calledst in trouble, and I delivered thee (see Exodus 2:23; Exodus 3:7; Exodus 14:10, etc.). I answered thee in the secret place of thunder. The pillar of the cloud seems to be meant. In this, and from this, God answered the cry of his people (Exodus 14:24). I proved thee at the waters of Meribah (Exodus 17:7). The "selah" after these words marks a pause, during which the people addressed might reflect on the manifold mercies which God had vouchsafed to them in Egypt, in the wilderness, and elsewhere.

81:1-7 All the worship we can render to the Lord is beneath his excellences, and our obligations to him, especially in our redemption from sin and wrath. What God had done on Israel's behalf, was kept in remembrance by public solemnities. To make a deliverance appear more gracious, more glorious, it is good to observe all that makes the trouble we are delivered from appear more grievous. We ought never to forget the base and ruinous drudgery to which Satan, our oppressor, brought us. But when, in distress of conscience, we are led to cry for deliverance, the Lord answers our prayers, and sets us at liberty. Convictions of sin, and trials by affliction, prove his regard to his people. If the Jews, on their solemn feast-days, were thus to call to mind their redemption out of Egypt, much more ought we, on the Christian sabbath, to call to mind a more glorious redemption, wrought out for us by our Lord Jesus Christ, from worse bondage.Thou calledst in trouble, and I delivered thee,.... That is, when Israel were in trouble in Egypt, as the Targum adds, and they cried unto the Lord in their distress, he heard them, and answered them, and sent them a deliverer, and brought them out of all their troubles, Exodus 3:7.

I answered thee in the secret place of thunder; by bringing the plague of thunder and lightnings upon the Egyptians, when the Israelites were hidden from them; a sense given by some, as Kimchi observes: or rather this was done when the Lord looked out of the pillar of cloud at the Red sea upon the Egyptian host, and troubled them; at which time the voice of his thunder was heard in heaven, Psalm 77:16. Some think this has reference to the thunder at the giving of the law on Mount Sinai; but the sense before given is best:

I proved thee at the waters of Meribah; by withholding water from them to try them, and see whether they would behave patiently, and put their trust and confidence in the Lord, or not; see Exodus 17:4.

Selah. See Gill on Psalm 3:2.