86 Grk “he said”; the referent (Jesus) has been specified in the translation for clarity.
87 That is, Peter’s denials will happen before the sun rises.
88 Once again, Jesus is quite aware that Peter will deny him. Peter, however, is too nonchalant about the possibility of stumbling.

In other versions

Jesus said, “I tell you, Peter, the rooster will not crow this day, until you deny three times that you know me.”

Jesus answered, “I tell you, Peter, before the rooster crows today, you will deny three times that you know me.”

“I tell you, Peter,” he said, “the rooster will not crow today until you deny three times that you know me.”

But Jesus said, “Peter, let me tell you something. Before the rooster crows tomorrow morning, you will deny three times that you even know me.”

And he said, “I tell you, Peter, the rooster will not crow today until you have denied three times that you know me!”

And he said, I tell thee, Peter, the cock shall not crow this day, before that thou shalt thrice deny that thou knowest me.

Public Domain