have the patience of a saint

Translations
иметь терпение святого
Someone must have the patience of a saint to deal with all those complaints every day.
Кому-то должно хватать терпения святого, чтобы справляться со всеми этими жалобами каждый день.
Definitions
To possess an extraordinary level of patience, often in the face of difficult or frustrating situations, similar to the legendary patience attributed to saints.