ثقيف
The background of these verses was the dispute between two clans, Banu Thaqif and Banu Amr ibn al-Mughirah. The verse is addressed to the Banu Thaqifa who insisted that they be able to collect "riba" from the Banu Amr ibn al-Mughirah for a loan made to them, despite having signed a peace treaty forgoing claims of "riba".