A short speech for they died and were removed out of, &c, as appears from the next verse; it being frequent in the Hebrew tongue under one verb expressed to understand another agreeable to it. See examples in the Hebrew, Genesis 43:33,34 Exo 18:12 25:2 Proverbs 25:22.
Related Commentaries of Exodus 8:13
Exodus 8:13
13 And the LORD did according to the word of Moses; and the frogs died out of the houses, out of the villages, and out of the fields.