And Miriam the prophetess, the sister of Aaron, took a timbrel in her hand; and all the women went out after her with timbrels and with {k} dances.

(k) Signifying their great joy: a custom the Jews observed in certain situations, Jud 11:34 but it should not be used as a means to justify our wanton dances.

Wesley's Notes

15:20 Miriam (or Mary, it is the same name) presided in an assembly of the women, who (according to the common usage of those times) with timbrels and dances, sung this song. Moses led the psalm, and gave it out for the men, and then Miriam for the women. Famous victories were wont to be applauded by the daughters of Israel, 1Sam 18:6,7, so was this. When God brought Israel out of Egypt, it is said, Mic 6:4, he sent before them Moses, Aaron, and Miriam; though we read not of any thing remarkable that Miriam did but this. But those are to be reckoned great blessings to a people, that go before them in praising God.

Jamieson-Fausset-Brown Bible Commentary

20. Miriam the prophetess-so called from her receiving divine revelations (Nu 12:1; Mic 6:4), but in this instance principally from her being eminently skilled in music, and in this sense the word "prophecy" is sometimes used in Scripture (1Ch 25:1; 1Co 11:5).

took a timbrel-or "tabret"-a musical instrument in the form of a hoop, edged round with rings or pieces of brass to make a jingling noise and covered over with tightened parchment like a drum. It was beat with the fingers, and corresponds to our tambourine.

all the women went out after her with timbrels and with dances-We shall understand this by attending to the modern customs of the East, where the dance-a slow, grave, and solemn gesture, generally accompanied with singing and the sound of the timbrel, is still led by the principal female of the company, the rest imitating her movements and repeating the words of the song as they drop from her lips.

Matthew Henry's Concise Commentary

15:1-21 This song is the most ancient we know of. It is a holy song, to the honour of God, to exalt his name, and celebrate his praise, and his only, not in the least to magnify any man. Holiness to the Lord is in every part of it. It may be considered as typical, and prophetical of the final destruction of the enemies of the church. Happy the people whose God is the Lord. They have work to do, temptations to grapple with, and afflictions to bear, and are weak in themselves; but his grace is their strength. They are often in sorrow, but in him they have comfort; he is their song. Sin, and death, and hell threaten them, but he is, and will be their salvation. The Lord is a God of almighty power, and woe to those that strive with their Maker! He is a God of matchless perfection; he is glorious in holiness; his holiness is his glory. His holiness appears in the hatred of sin, and his wrath against obstinate sinners. It appears in the deliverance of Israel, and his faithfulness to his own promise. He is fearful in praises; that which is matter of praise to the servants of God, is very dreadful to his enemies. He is doing wonders, things out of the common course of nature; wondrous to those in whose favour they are wrought, who are so unworthy, that they had no reason to expect them. There were wonders of power and wonders of grace; in both, God was to be humbly adored.