Narrated Aisha, Ummul Mu'minin:

Riders would pass us when we accompanied the Messenger of Allah (ﷺ) while we were in the sacred state (wearing ihram). When they came by us, one of us would let down her outer garment from her head over her face, and when they had passed on, we would uncover our faces.

حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا يَزِيدُ بْنُ أَبِي زِيَادٍ، عَنْ مُجَاهِدٍ، عَنْ عَائِشَةَ، قَالَتْ كَانَ الرُّكْبَانُ يَمُرُّونَ بِنَا وَنَحْنُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم مُحْرِمَاتٌ فَإِذَا حَاذَوْا بِنَا سَدَلَتْ إِحْدَانَا جِلْبَابَهَا مِنْ رَأْسِهَا إِلَى وَجْهِهَا فَإِذَا جَاوَزُونَا كَشَفْنَاهُ ‏.‏