Parallel
Revelation 3:11
Nestle 1904 Greek New Testament · Berean Standard Bible
ἔρχομαι ταχύ κράτει ὃ ἔχεις ἵνα μηδεὶς λάβῃ τὸν στέφανόν σου
I am coming soon (note: Or suddenly or quickly). Hold fast to what you have, so that no one will take your crown.