乃往古世(nǎi wǎng gŭ shì) “in an age long ago, in the past”
not found at HD. 1.628.; not found at DK. 1.340.;
59b29.乃往古世，过无量、无边、不可思议、阿僧祇劫，有佛，名云雷音宿王华智多陀阿伽度、阿罗诃、三藐三佛陀(p)
K. 457.1.bhūtapūrvaṃ … atīte ’dhvani; Z. 131a1.乃往过去;