Devarim (28:9-10)You stand this day, all of you, before your God יהוה —your tribal heads, your elders, and your officials, every householder in Israel, your children, your wives, even the stranger within your camp, from woodchopper to waterdrawer—
Rashi (Devarim 29:10) FROM THE WOODCUTTER [UNTO THE DRAWER OF THE WATER] — This teaches that some of the Canaanites came in Moses' days to become proselytes just as the Gibeonites came in the days of Joshua, — and this is the meaning of what is stated of the Gibeonites, (Joshua 9:4) “And they also acted cunningly”; — and Moses made them woodcutters and drawers of water (cf. Midrash Tanchuma, Nitzavim 2).