Cross reference
Deuteronomy 2:28
28 Thou shalt sell me food for money, that I may eat; and give me water for money, that I may drink: only let me pass through on my feet,
Numbers 20:19
19 And the children of Israel said unto him, We will go up by the highway; and if we drink of thy water, I and my cattle, then will I give the price thereof: let me only, without `doing' anything `else', pass through on my feet.