فَإِنْ وَجَدَهُ وَلَوْ بِالْإِبَاحَةِ وَرُبْعُهُ طَاهِرٌ لَا تَصِحُّ صَلَاتُهُ عَارِيًا، وَخُيِّرَ إِنْ طَهُرَ أَقَلُّ مِنْ رُبْعِهِ، وَصَلَاتُهُ فِي ثَوْبٍ نَجِسٍ الْكُلِّ أَحَبُّ مِنْ صَلَاتِهِ عُرْيَانًا
• If at least one-quarter of the available garment is pure, it must be used; praying naked is not valid.
• If less than one-quarter is pure, there is a choice between wearing it and praying naked, though wearing the impure garment is preferred.
• Even when the whole garment is impure, wearing it is preferred to praying naked under the text's rule.