How to show that a character is quoting from a book?

Question

I am editing a text in which the characters use quotations from the Bible quite often.Example: Jeremiah turned toward him, "Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice..."All he says is a quote from Romans:12. How do I show that he is quoting and these are not the character's words? Do I add single quotation marks around the entire quote? It looks weird, to say the least:"'Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice...'"I hope somebody can help. Thank you!

Answer 1

I like using italics in such situations. See if that makes it look cleaner and more understandable. But single quotes within regular quotes is correct as well!

Answer 2

The parts where someone is speaking in the bible there should be single quotes inside of the double ones yes.

However, here it looks like this is where the speaking is:

"Jeremiah turned toward him, 'Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice [...] '" (Romans 12).

The bold part is the speaking portion (in single quotes) and the regular text is just the narration (quoted with double quotations to show that)

Does this make sense?