ἐμφρουρεῖν
From LSJ
Κύριος εἶπεν πρὸς μέ Υἱός μου εἶ σύ, ἐγὼ σήμερον γεγέννηκά σε → the Lord said to me, My son you are; today I have begotten you
Greek > English (Woodhouse Verbs Reversed)
(see also: ἐμφρουρῶ, ἐμφρουρέω) be on guard
Lexicon Thucydideum
custodias agere in loco, to keep watch at a place, 4.110.1, 8.60.1.