Hyginus Fabulae 92
Judgment of Paris
Jupiter, when Thetis was marrying Peleus, is said to have invited all the gods to the feast except Eris, whose name in Latin is "Discordia" (or Strife). When she arrived at the feast and was not allowed in, she threw from the outer door an apple into the midst of the feast and she said that whoever was the most beautiful should pick it up. Juno, Venus, and Minerva each began to make the case for her own beauty. A great strife arose among them. Jupiter order Mercury to accompany the goddesses to Alexander Paris on Mt Ida and bid him to adjudicate. To him Juno promised that, if he should judge favorably for her, he would rule over all nations and that he would the wealthiest man on earth; Minerva promised that, if she should emerge victorious, he would be the mightiest among mortals and knowledgeable in every craft; Venus, though, promised to give Helen, the daughter of Tyndareus, the most beautiful of all women, for him to marry. Paris preferred the gift of the last over the earlier and found Venus to be the most beautiful; for this reason, Juno and Minerva hated the Trojans. Alexander was prompted by Venus to abduct Helen from Sparta (i.e. Lacedaemon) from his host Menelaus to Troy, and he kept her as a wife with her two maidservants Aethra and Thisiadia, whom Castor and Pollux had given her as slaves though they once had been queens.
         —— trans by RTM


Paridis Iudicium

Iouis cum Thetis Peleo nuberet ad epulum dicitur omnis deos conuocasse excepta Eride, id est Discordia, quae cum postea superuenisset nec admitteretur ad epulum, ab ianua misit in medium malum, dicit quae esset formosissima attolleret. (2) Iuno Venus Minerua formam sibi uindicare coeperunt, inter quas magna discordia orta, Iouis imperat Mercurio ut deducat eas in Ida monte ad Alexandrum Paridem eumque iubeat iudicare. (3) cui Iuno, si secundum se iudicasset, pollicita est in omnibus terris eum regnaturum, diuitem praeter ceteros praestaturum; Minerua, si inde uictrix discederet, fortissimum inter mortales futurum et omni artificio scium; Venus autem Helenam Tyndarei filiam formosissimam omnium mulierum se in coniugium dare promisit. (4) Paris donum posterius prioribus anteposuit, Veneremque pulcherrimam esse iudicauit; ob id Iuno et Minerua Troianis fuerunt infestae. (5) Alexander Veneris impulsu Helenam a Lacedaemone ab hospite Menelao Troiam abduxit eamque in coniugio habuit cum ancillis duabus Aethra et Thisiadie, quas Castor et Pollux captiuas ei assignarant, aliquando reginas.