Surah Maryam 19:17

فَٱتَّخَذَتْ مِن دُونِهِمْ حِجَابًا فَأَرْسَلْنَآ إِلَيْهَا رُوحَنَا فَتَمَثَّلَ لَهَا بَشَرًا سَوِيًّا

And she took, in seclusion from them, a screen. Then We sent to her Our Angel [i.e., Gabriel], and he represented himself to her as a well-proportioned man.

Translation: Saheeh International

Tafsir

Thus she veiled herself from them she draped herself in a veil to conceal herself while she washed her hair from lice or washed her clothes or cleansed herself from her menses; …

Excerpt from Tafsir al-Jalalayn, commentary on 19:17, via Quran.com. The reader has the full commentary and 9 more tafsirs.