en_tn/rev/03/03.md

what you have received and heard

This refers to God's word, which they believed. Alternate translation: "God's word that you heard and the truth that you believed" (See: rc://en/ta/man/jit/figs-explicit)

if you do not wake up

Being alert to danger is spoken of as waking up. See how you translated "wake up" on Revelation 3:2. Alternate translation: "If you are not alert" or "If you are not careful" (See: rc://en/ta/man/jit/figs-metaphor)

I will come as a thief

Jesus will come at a time when people do not expect him, just as a thief comes when not expected. (See: rc://en/ta/man/jit/figs-simile)