The Niobids were the children of Amphion of Thebes and Niobe. They were slain by Apollo and Artemis because Niobe, born of the royal house of Phrygia, had boastfully compared the greater number of her own offspring with those of Leto, Apollo's and Artemis' mother.
Half of Niobe’s children were sons, the other half were daughters. During the slaughter, Artemis killed her daughters while Apollo killed her sons.</p>
Manto, the seeress daughter of Tiresias, overheard Niobe's remark and bid the Theban women placate Leto, in vain. Apollo and Artemis slew all the children of Niobe with their arrows. The Niobids were buried by the gods at Thebes. Ovid remarked that all men mourned Amphion, for the extinction of his line, but none mourned Niobe save her brother Pelops.