一切經音義 50.211

50.211

帝釋青（梵言因陀羅尼目多是帝釋寶亦作青色以其㝡勝故稱帝釋青或解言帝釋所居處波利質多羅樹下地是此寶故名帝釋青目多此云珠以此寶為珠也）。

帝釋青 (Śakra-blue: Sanskrit indranīla-muktā, the jewel of Śakra. It is also blue. Because it is supreme, it is called "Śakra-blue." Or it is explained as: the ground under the pārijāta tree where Śakra dwells is made of this gem, hence the name "Śakra-blue." Muktā here means pearl, as this gem is used as a pearl).