To the chief Musician, A Psalm for the sons of Korah. Thus psalm is thought by some to be written on occasion of the ark being brought from the house of Obededom to the city of David, to the place he had prepared for it; which was attended with singing and dancing, with shouting, and the sound of a trumpet, 2Sa 6:12; but it rather seems to be penned on account of the ascension of Christ to heaven, prophetically spoken of in this psalm; and of the spread of the Gospel, and the conquests it made in the Gentile world upon Christ's ascension; as the whole psalm shows: and even Aben Ezra and Kimchi apply it to the times of the Messiah; and so do some of their most ancient writers, who particularly interpret Ps 47:5 of him, as may be seen in the note upon it.
Ver. 1. O clap your hands, all ye people, Meaning the Gentiles more especially; see Ps 117:1 compared with Ro 15:9; who had reason to rejoice and be glad, since the ascended Lord and King here spoken of was given to be their Saviour, was the propitiation for their sins, and had given himself a ransom price for them; and now the Gospel was preached among them, by an order from him after his resurrection; and upon his ascension gifts were bestowed on his apostles, qualifying them for it; when many of them were converted by it, and were made partakers of the same grace and privileges with the Jews that believed in Christ, and were formed into Gospel churches.
Wherefore they are called upon to declare their joy and gladness by "clapping their hands"; which is a gesture expressive of exultation and joy; see Ps 98:8 Na 3:19. It was used at the unction and coronation of a king, 2Ki 11:12; and so very proper to be used on occasion of the Messiah being made or declared Lord and Christ, as he was at his ascension, Ac 2:36;shout unto God with the voice of triumph; as when triumphs are made on account of victories obtained, which was now the case; Christ having conquered sin, Satan, and the world, by his sufferings and death, and having spoiled principalities and powers, made a show of them, openly triumphing over them, when he ascended on high, and led captivity captive; and he having sent his apostles into the Gentile world with his Gospel, they were caused to triumph in him wherever they came.