(105) باب التَّخْفِيفِ فِي التَّشَهُّدِ الأَوَّلِ
It was narrated that 'Abdullah bin Mas'ud said:
"In the first two rak'ahs the Prophet (ﷺ) was as if he were on stones heated by fire." (FR)
Reference (FR): Sunan an-Nasa'i 1176 (FR)
In-book reference (FR): Book 12, Hadith 148 (FR)
English translation (FR): Vol. 2, Book 12, Hadith 1177 (FR)