Bulugh al-Maram 79
Narrated Anas bin Malik (rad):
The Prophet (ﷺ) had blood extracted from his body and offered the prayer and did not perform (a new) ablution. [Reported by Ad-Daraqutni who graded it Da’if (weak)].
وَعَنْ أَنَسِ]بْنِ مَالِكٍ] ‏- رضى الله عنه ‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-اِحْتَجَمَ وَصَلَّى, وَلَمْ يَتَوَضَّأْ }  أَخْرَجَهُ اَلدَّارَقُطْنِيُّ, وَلَيَّنَه ُ  1‏ .‏‏1 ‏- ضعيف.‏ رواه الدارقطني (151‏-152)‏.‏