حَتَّى مَوْضِعَ الْقَدَمَيْنِ وَالْيَدَيْنِ وَالرُّكْبَتَيْنِ وَالْجَبْهَةِ عَلَى الْأَصَحِّ
On the sound position stated here, the places touched by the feet, hands, knees and forehead must be pure. The entire room or every distant corner of a large rug does not become a condition merely because the worshipper is praying in that room.
This passage names the forehead; the previous version incorrectly added the nose to this specific list.