What custom was practiced by French nuns before remembered today?

Before the French Revolution, many French nuns practiced the custom of **"streaking" relics**. This didn't involve nudity as the word means today. Instead, it referred to the practice of touching sacred relics, like bone fragments or pieces of clothing attributed to saints, to the sick or objects needing a blessing. They would then "streak" or rub the relic against the person or object, believing it would transfer the saint's holiness and healing power. This practice, while common then, is largely forgotten or not widely remembered today, overshadowed by other pre-revolutionary customs.