Hadithcore
Sahih al-Bukhari, 3814
sahih

Narrated Abu Burda:

When I came to Medina. I met `Abdullah bin Salam. He said, "Will you come to me so that I may serve you with Sawiq (i.e. powdered barley) and dates, and let you enter a (blessed) house that in which the Prophet (ﷺ) entered?" Then he added, "You are In a country where the practice of Riba (i.e. usury) is prevalent; so if somebody owe you something and he sends you a present of a load of chopped straw or a load of barley or a load of provender then do not take it, as it is Riba."

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سَعِيدِ بْنِ أَبِي بُرْدَةَ، عَنْ أَبِيهِ، أَتَيْتُ الْمَدِينَةَ فَلَقِيتُ عَبْدَ اللَّهِ بْنَ سَلاَمٍ ـ رضى الله عنه ـ فَقَالَ أَلاَ تَجِيءُ فَأُطْعِمَكَ سَوِيقًا وَتَمْرًا، وَتَدْخُلَ فِي بَيْتٍ ثُمَّ قَالَ إِنَّكَ بِأَرْضٍ الرِّبَا بِهَا فَاشٍ، إِذَا كَانَ لَكَ عَلَى رَجُلٍ حَقٌّ فَأَهْدَى إِلَيْكَ حِمْلَ تِبْنٍ، أَوْ حِمْلَ شَعِيرٍ أَوْ حِمْلَ قَتٍّ، فَلاَ تَأْخُذْهُ، فَإِنَّهُ رِبًا‏.‏ وَلَمْ يَذْكُرِ النَّضْرُ وَأَبُو دَاوُدَ وَوَهْبٌ عَنْ شُعْبَةَ الْبَيْتَ‏.‏

References2 variants
In-Book Reference
Book 63, Hadith 39
USC-MSA web (English) reference
Vol. 5, Book 58, Hadith 159 (deprecated numbering scheme)