Rashi on Numbers 20:8/רש"י על במדבר כ׳:ח׳

1ואת בעירם [SO SHALT THOU GIVE THE CONGREGATION] AND THEIR BEASTS [TO DRINK] From this we may see that the Holy One, blessed be He, has regard for the possessions of Israel (Menachot 76b; Midrash Tanchuma, Chukat 9).