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nasai-kubra:6522 – Muḥammad b. Ḥātim > Ḥibbān > ʿAbdullāh > Muḥammad b. Isḥāq > Makḥūl

It was narrated from Tawus that the Messenger of Allah made 'Umra and Ruqba binding. (Using translation from Nasāʾī 3726)  

الكبرى للنسائي:٦٥٢٢ – أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمٍ قَالَ حَدَّثَنَا حِبَّانُ قَالَ أَخْبَرَنَا عَبْدُ اللهِ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ قَالَ حَدَّثَنَا مَكْحُولٌ

عَنْ طَاوُسٍ بَتَلَ رَسُولُ اللهِ ﷺ «الْعُمْرَى وَالرُّقْبَى»  

See similar narrations below:

Collected by Nasāʾī
nasai:3711 – Muḥammad b. Bashhār > Yaḥyá > Sufyān > Abū al-Zubayr > Ṭāwus > Ibn ʿAbbās

"'Umra and Ruqba are the same."  

النسائي:٣٧١١ – أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ قَالَ حَدَّثَنَا يَحْيَى قَالَ حَدَّثَنَا سُفْيَانُ عَنْ أَبِي الزُّبَيْرِ عَنْ طَاوُسٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

الْعُمْرَى وَالرُّقْبَى سَوَاءٌ  

nasai:3726 – Muḥammad b. Ḥātim > Ḥibbān > ʿAbdullāh > Muḥammad b. Isḥāq > Makḥūl

It was narrated from Tawus that the Messenger of Allah made 'Umra and Ruqba binding.  

النسائي:٣٧٢٦ – أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمٍ قَالَ حَدَّثَنَا حِبَّانُ قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ قَالَ حَدَّثَنَا مَكْحُولٌ

عَنْ طَاوُسٍ بَتَلَ رَسُولُ اللَّهِ ﷺ الْعُمْرَى وَالرُّقْبَى