'Failing' in the Bible

“Be careful that you don’t forget the Lord your God by failing to keep His command—the ordinances and statutes—I am giving you today.

And among these nations shalt thou find no ease, neither shall the sole of thy foot have rest: but the LORD shall give thee there a trembling heart, and failing of eyes, and sorrow of mind:

For both of you broke faith with Me among the Israelites at the waters of Meribath-kadesh in the Wilderness of Zin by failing to treat Me as holy in their presence.