rebelled. Compare Numbers 20:24.
My commandment. Hebrew "My mouth". Figure of speech Metonymy (of Cause), App-6, "mouth" put for what is spoken by it.
water. Compare Exodus 17:7. Of another Meribah.
Related Commentaries of Numbers 27:14
Numbers 27:14
14 For ye rebelled against my commandment in the desert of Zin, in the strife of the congregation, to sanctify me at the water before their eyes: that is the water of Meribah in Kadesh in the wilderness of Zin.