Cross reference
Numbers 20:19
19 And the children of Israel said to him, We will go up by the highway: and if we or our cattle take of your water, we will give you a price for it: only let us go through on our feet, nothing more.
Deuteronomy 2:6
6 You may get food for your needs from them for a price, and water for drinking.
Deuteronomy 2:28
28 Let me have food, at a price, for my needs, and water for drinking: only let me go through on foot;
Exodus 12:38
38 And a mixed band of people went with them; and flocks and herds in great numbers.