It’s not known what play it’s from, though modern scholars have made various guesses. It’s fr.350 Radt, the standard edition of Aeschylus’ fragments, with commentary in Latin. Used to be fr.189; an old translation online at https://www.theoi.com/Text/AeschylusFragments3.html. Lloyd-Jones discusses it; I don’t remember if it’s in Alan Sommerstein’s Loeb (Aesch. vol.3), but it should be. Best critical text is in Diggle’s Tragicorum Graecorum Fragmenta Selecta.
Aeschylus (if it is Aeschylus) is alluding to Apollo’s attendance at the wedding of Peleus and Thetis—see esp. Pindar’s Pythian Ode 5 and the Francois Vase. The most memorable account of the Wedding is in Catullus 64, but there Apollo is expressly said to have been absent—an unorthodox version of the celebrated myth.