Sunan an-Nasa'i 4622
سنن النسائي#4622Sahihأَخْبَرَنَا يَحْيَى بْنُ حَكِيمٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَيُّوبَ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " السَّلَفُ فِي حَبَلِ الْحَبَلَةِ رِبًا " .
It was narrated from Ibn 'Abbas that the Propher said:"Paying in advance for the offspring of the offspring of a pregnant animal (Habal al-Habalah) is Riba
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih Hadith
Zubair Ali ZaiIsnaad Sahih
In-book reference: 44:174