(187) باب مَا جَاءَ فِي الاِجْتِهَادِ فِي الصَّلاَةِ
Al-Mughirah bin Shu'bah narrated:
"Allah's Messenger (S) performed Salat until his feet were swollen, so it was said to him: 'You burden yourself like this, while your past and future sins have been forgiven?' He said: 'Shouldn't I be a grateful worshipper?'" (FR)
Reference (FR): Jami` at-Tirmidhi 412 (FR)
In-book reference (FR): Book 2, Hadith 265 (FR)
English translation (FR): Vol. 1, Book 2, Hadith 412 (FR)