صفة الوضوء
‘Amr ibn Ka‘b or Ka‘b ibn ‘Amr al-Hamdāni (may Allah be pleased with him) reported: I entered (meaning: upon the Prophet (may Allah's peace and blessings be upon him) while he was performing ablution, and the water was dripping from his face and beard onto his chest, and I saw him rinsing his mouth in a separate action from sniffing water into his nose.
عن عمرو بن كعب أو كعب بن عمرو الهمداني -رضي الله عنه- قال: دَخَلْتُ -يَعْنِى: عَلَى النَّبِي صلى الله عليه وسلم- وَهُوَ يَتَوَضَّأُ وَالْمَاءُ يَسِيلُ مِنْ وَجْهِهِ وَلِحْيَتِهِ عَلَى صَدْرِهِ فَرَأَيْتُهُ يَفْصِلُ بَيْنَ الْمَضْمَضَةِ وَالاِسْتِنْشَاقِ.
شرح الحديث :
Talhah ibn Musarrif reported from his father from his grandfather that he said: "I entered (meaning: upon the Prophet (may Allah's peace and blessings be upon him) while he was performing ablution, and the water was dripping from his face and beard onto his chest, and I saw him rinsing his mouth in a separate action from sniffing water into his nose", meaning: he took a handful of water to rinse his mouth and another handful to sniff water into his nose. So for rinsing and sniffing thrice, one would take six handfuls: three for rinsing the mouth and three for sniffing water into the nose. The Hadīth is a proof for whoever holds that one should separate in ablution between rinsing the mouth and sniffing water into the nose. However, the Hadīth is weak and cannot be used as evidence. What is confirmed from the Prophet (may Allah's peace and blessings be upon him) is that he did not separate between rinsing the mouth and sniffing water into the nose; rather, he performed them both with the same water. He would take one handful, half of which for the mouth and half for the nose, because the mouth and nose are in the same organ (the face) so there is no need to take new water for the nose. Therefore, the confirmed act of Sunnah is to combine rinsing the mouth and sniffing water into the nose in one action.