Charles Ellicott Commentary Psalms 106:32-33

"They angered him also at the waters of Meribah, So that it went ill with Moses for their sakes; Because they were rebellious against his spirit, And he spake unadvisedly with his lips." — Psalms 106:32-33 (ASV)

The insurrection against Moses and Aaron at Meribah Kadesh, entailing on the Lawgiver the forfeiture of his own entry into Canaan. (See references in the margin.)