Parallel
Exodus 8:2
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ἐξέτεινεν Ααρων τὴν χεῖρα ἐπὶ τὰ ὕδατα Αἰγύπτου καὶ ἀνήγαγεν τοὺς βατράχους καὶ ἀνεβιβάσθη ὁ βάτραχος καὶ ἐκάλυψεν τὴν γῆν Αἰγύπτου
But if you refuse to let them go, I will plague your whole country with frogs.