He recorded it in al-Mu'jam al-Kabir, and its wording is: "One deal within two deals is usury (riba)."
This narration is "mawquf" (stopping at the Companion).
Al-Bazzar recorded it likewise and added: the Prophet (peace and blessings be upon him) ordered us to perform ablution thoroughly. The narrators of Ahmad are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6384