Milton's alluding to what he took to be the divinely inspired prophesy of Saint John the Divine that ends the New Testament.

弥尔顿的暗示是从,圣约翰的布道中启发的,他是那位完结了《新约》的神学家。

耶鲁公开课 - 弥尔顿课程节选

John the Divine had written in Revelation 14 -- you know this: and no man could learn that song but the one hundred and forty and four thousand, which were redeemed from the earth.

圣约翰在《启示录》第14卷中写道--你们都知道：,没人唱的了这首歌，除了那四千一百四十人,那些被从人间救赎的人。

耶鲁公开课 - 弥尔顿课程节选