Rashi on Exodus 9:19/רש"י על שמות ט׳:י״ט

1שלח העז translate it as the Targum: SEND, GATHER. Similar examples of this sense are, (Isaiah 10:31) “The inhabitants of Gebim gather together (העיזו)”; (Jeremiah 6:1) “Gather together (העיזו), ye children of Benjamin”.

2ולא יאסף הביתה The verb denotes “bringing into a place” so that the translation is: AND WHICH IS NOT GATHERED INTO THE HOUSE.