In plain words
One girl sings, as they leap in the unti game [a girls' game of leaping and singing in turn]: That day, when Indra's queen would not give the lovely kalpaka flower to the consort of my Lord [Satyabhāmā], my Lord, even as her husband Indra looked on, had his strong bird [Garuḍa], whose form is the Sāma Veda, tear up the cool flowering tree by force, and planted it for her. Sing of my Lord's strength, and leap! Sing of our Lord's strength, and leap!