Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai:4139ʿAmr b. Yazīd > Ibn Abū ʿAdī > Ḥammād b. Salamah > Muḥammad b. Isḥāq > ʿAmr b. Shuʿayb from his father from his grandfather

the Messenger of Allah went to a camel, and took a hair from its hump between his fingers and said: "I am not entitled to take anything from the Fay, not even this, except the Khumus, and the Khumus will come back to you."  

النسائي:٤١٣٩أَخْبَرَنَا عَمْرُو بْنُ يَزِيدَ قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ قَالَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ رَسُولَ اللَّهِ ﷺ أَتَى بَعِيرًا فَأَخَذَ مِنْ سَنَامِهِ وَبَرَةً بَيْنَ إِصْبَعَيْهِ ثُمَّ قَالَ إِنَّهُ لَيْسَ لِي مِنَ الْفَىْءِ شَىْءٌ وَلاَ هَذِهِ إِلاَّ الْخُمُسُ وَالْخُمُسُ مَرْدُودٌ فِيكُمْ  


See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:4425ʿAmr b. Yazīd > Ibn Abū ʿAdī > Ḥammād b. Salamah > Muḥammad b. Isḥāq > ʿAmr b. Shuʿayb from his father from his grandfather

the Messenger of Allah went to a camel, and took a hair from its hump between his fingers and said: "I am not entitled to take anything from the Fay, not even this, except the Khumus, and the Khumus will come back to you." (Using translation from Nasāʾī 4139)  

الكبرى للنسائي:٤٤٢٥أَخْبَرَنَا عَمْرُو بْنُ يَزِيدَ قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ قَالَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ رَسُولَ اللهِ ﷺ أَتَى بَعِيرًا فَأَخَذَ مِنْ سَنَامِهِ وَبَرَةً بَيْنَ إِصْبُعَيْهِ ثُمَّ قَالَ «هَا إِنَّهُ لَيْسَ لِي مِنَ الْفَيْءِ شَيْءٌ وَلَا هَذِهِ إِلَّا الْخُمُسُ وَالْخُمُسُ مَرْدُودٌ فِيكُمْ»