As the comes in front tour folds appear on her front side and as she turns her back eight folds appear on the back side. Thereupon Allah's Apostle (ﷺ) said: I me that he knows these things; do not, therefore. allow him to cater. She (" A'isha) said: Then they began to observe veil from him.
Sahih Muslim Book 39, Hadith 45