ABLUTION AFTER EATING H 761 "Sa'id asked Jabir whether it was obligatory to re-wash for prayer after eating cooked food. He replied, 'No, during the time of the Prophet, praise and peace be upon him, we rarely had such food, nor did we have napkins. When we ate our food we wiped our fingers on our palms, forearms or feet. It is unnecessary to repeat one's ablution for prayer on that account.'" R 761 Bukhari with a chain up to Sa'id, the son of Harith who related this.
753- وعن سعيد بنِ الحارث : أنّه سأل جابراً رضي الله عنه عنِ الوُضُوءِ مِمَّا مَسَّتِ النَّارُ ، فَقَالَ : لا ، قَدْ كُنَّا زَمَنَ النبيِّ صلى الله عليه وآله وسلم لا نَجِدُ مِثْلَ ذَلِكَ الطَّعامِ إِلاَّ قليلاً ، فإذا نَحْنُ وجَدْنَاهُ ، لَمْ يَكُنْ لنا مَنَادِيلُ إِلاَّ أكُفَّنا ، وسَواعِدَنَا ، وأقْدامَنَا ، ثُمَّ نُصَلِّي وَلاَ نَتَوَضَّأُ . رواه البخاري .