觀無量壽佛經義疏 3.57

3.57

「『阿難！當知無量壽佛身，如百千萬億夜摩天閻浮檀金色。』」百千萬億夜摩天，喻其大也。閻浮金，言其自體也。二、示身量。

" 'Ānanda, you should know that the body of the Buddha Amitāyus is like the colour of the Jāmbūnada gold of hundreds of thousands of koṭis of Yāma heavens.'" Hundreds of thousands of koṭis of Yāma heavens illustrates its vastness. Jāmbūnada gold speaks of its intrinsic substance. Second, showing the body size.