[Machine] I performed the ritual washing (ghusl) of janabah for the Messenger of Allah ﷺ , and he mentioned a hadith about the Prophet's ghusl. So, I handed him a towel, but he did not take it and instead flicked his hand. Al-A'mash said, "So, I mentioned this to Ibrahim and he said, 'He disliked that out of fear of setting a precedent.'"
وَضَعْتُ لِرَسُولِ اللهِ ﷺ غُسْلًا مِنَ الْجَنَابَةِ فَذَكَرَ الْحَدِيثَ فِي غُسْلِ النَّبِيِّ ﷺ قَالَتْ فَنَاوَلْتُهُ مِنْدِيلًا فَلَمْ يَأْخُذْهُ وَجَعَلَ يَنْفُضُ بِيَدِهِ قَالَ الْأَعْمَشُ فَذَكَرْتُ ذَلِكَ لِإِبْرَاهِيمَ فَقَالَ إِنَّمَا كَرِهَ ذَلِكَ مَخَافَةَ الْعَادَةَ