20:10-12 Instead of reverently obeying God’s instructions, Moses rebuked the people (Must we bring you water from this rock?) and angrily struck the rock twice with the staff (20:11). God regarded Moses’ words and actions as a serious breach of faith; Moses “spoke foolishly” (Ps 106:32-33; cp. Jas 1:20) and did not trust God enough to demonstrate his holiness. By not doing exactly as he was told, Moses demonstrated a lack of faith in God to provide for his people. This lack of faith is also apparent in Moses’ words to the people. The Lord requires obedience and faith; anything less is an affront to his holy character (Num 20:24; 27:14). Such serious lack of obedience and faith had the same result as it had earlier (14:20-23; see also 1 Cor 10:4-12).

20:14-21 Israel tried unsuccessfully to establish peaceful relations with Edom, with which it had apparently had no dealings since Esau (Edom) and Jacob (Israel) buried their father, Isaac (Gen 35:29; 36:6-8; cp. Gen 32:28). Moses’ appeal resembles the formal diplomatic correspondence of that era. While contacts with the Canaanites and other people groups were marked by hostility, communication with Edom was polite because of kinship ties (cp. Deut 2:4; 23:7). Those ties, however, were apparently not strong enough to overcome the ancient tension between Jacob and Esau (Gen 27:41).