Comentário sobre Êxodo 7:29

ובכה ובעמך AND UPON (or in) THEE AND THY PEOPLE [SHALL THE FROGS COME] — they made their way right into their bodies and crowed (Exodus Rabbah 10:3).

ובכה ובעמך, “against you as well as against your people.” The unusual letter ה at the end of the word ובך “and against you,” indicates that every one of the ten plagues was subdivided into 5 plagues [compare Haggadah shel Pessach Rabbi Yossi Hagalilee].

They would enter and croak. מקרקרין means crying out and making noise.