Acts 21:23

23Thisτοῦτοthereforeοὖνdo youποίησονwhatὅto youσοιwe sayλέγομεν·There areεἰσὶνwith usἡμῖνmenἄνδρεςfourτέσσαρεςa vowεὐχὴνhavingἔχοντεςuponἀφ’themselvesἑαυτῶν.

Therefore do this that we say to you. With us there are four men having a vow on themselves.