Muwatta Malik 87
موطأ مالك#87SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، أَنَّهُ سَمِعَهُ وَرَجُلٌ، يَسْأَلُهُ فَقَالَ إِنِّي لأَجِدُ الْبَلَلَ وَأَنَا أُصَلِّي، أَفَأَنْصَرِفُ فَقَالَ لَهُ سَعِيدٌ لَوْ سَالَ عَلَى فَخِذِي مَا انْصَرَفْتُ حَتَّى أَقْضِيَ صَلاَتِي .
Yahya related to me from Malik from Yahya ibn Said that he was listening to Said ibn al-Musayyab and a man questioned him saying, "I discover a liquid when I am praying. Should I leave?" Said ibn al-Musayyab said to him, "Even if it were to flow on my leg I would not leave until I had finished the prayer
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 2:56