金光明最勝王經疏 5.271

5.271

下第四說，文亦同前。言帝釋天主者，帝即是主，釋者是能，此云能帝，是總言也。後云天主者，能作天主。

Below is the fourth speech; the text is also the same as before. Regarding Śakra, Lord of the Devas: *di* (emperor/śakra) is 'lord', and *shi* (śakra) is 'capable'; here translated as 'capable lord' (*nengdi*), which is the general expression. The subsequent 'Lord of the Devas' means being capable of being the lord of devas.