一切經音義 12.268

12.268

天弓（或名帝弓即虹蜺也俗呼虹字為降音詩云螮蝀皆一也）。

天弓 (also named 'Indra's bow' (帝弓), which is the rainbow; vulgar speech calls the character 虹 as *jiàng*; the *Classic of Poetry* calls it *dìdōng* (螮蝀); all are the same).