Verse 60

وَٱلْقَوَٰعِدُ مِنَ ٱلنِّسَآءِ ٱلَّـٰتِى لَا يَرْجُونَ نِكَاحًا فَلَيْسَ عَلَيْهِنَّ جُنَاحٌ أَن يَضَعْنَ ثِيَابَهُنَّ غَيْرَ مُتَبَرِّجَـٰتٍۭ بِزِينَةٍ وَأَن يَسْتَعْفِفْنَ خَيْرٌ لَّهُنَّ وَٱللَّهُ سَمِيعٌ عَلِيمٌ

And the old women who have no hope of getting married commit no error if they relax their dress code, as long as they do not show their vanities. However, modesty is the best policy for them. And God is All Hearer, All Knower.