Numbers 20:18

The Edomites refused the visit of the Israelites in a most unbrotherly manner, and threatened to come out against them with the sword, without paying the least attention to the repeated assurance of the Israelitish messengers, that they would only march upon the high road, and would pay for water for themselves and their cattle. אין־דּבר רק, lit., "it is nothing at all; I will go through with my feet:" i.e., we want no great thing; we will only make use of the high road.

At this chapter begins the history of the fortieth year (which was the last year) of the Israelites' wandering in the wilderness. And since the beginning of their second year, when they were sentenced to perform their quarantine in the desert, there to wear away the tedious revolution of forty years, there is little recorded concerning them till this last year, which brought them to the borders of Canaan, and the history of this year is almost as large as the history of the first year. This chapter gives an account of, I. The death of Miriam (Num 20:1). II. The fetching of water out of the rock, in which observe, 1. The distress Israel was in, for want of water (Num 20:2). 2. Their discontent and murmuring in that distress (Num 20:3-5). 3. God's pity and power engaged for their supply with water out of the rock (Num 20:6-9). 4. The infirmity of Moses and Aaron upon this occasion (Num 20:10, Num 20:11). 5. God's displeasure against them (Num 20:12, Num 20:13). III. The negotiation with the Edomites. Israel's request (Num 20:14-17), and the repulse the Edomites gave them (Num 20:18-21). IV. The death of Aaron the high priest upon Mount Hor, the instalment of Eleazar in his room, and the people's mourning for him (Num 20:22, etc.).

20:18-21 Stay out of my land: As their ancestor Esau had distrusted Jacob (Gen 27:36), the Edomites now distrusted Jacob’s descendants. So Israel was forced to turn around and find another way to approach Canaan (cp. Deut 2:4-6).