7. ἐν φλογι πυρος is the reading of BDG 47 71, vg cop syr pesh, hcl txt, Tert; it appears to be a conformation to Isa 66:15, Exo 3:2 (Hebrew): so Act 7:30, with a varia lectio; Heb 1:7; Rev 1:14, &c. Weiss, on the other hand, supposes εν πυρι φλογος (given by אAKLP &c., and adopted by other critics) to be due to assimilation of εν φλογι πυρος to the LXX text of Exo 3:2.