الْمُوَاظِبُ عَلَى الطَّاعَاتِ الْمُجْتَنِبُ عَنِ الْمَعَاصِي
He persists in obedience and avoids sinful acts.
Muwāẓabah is consistent practice rather than occasional devotion. It includes avoiding excessive absorption in desire, without declaring lawful enjoyments forbidden.
A walī is not thereby declared infallible. The prophetic protection from error and the piety of a righteous believer are different statuses.