Sunan Abi Dawud — Oaths and Vows (Kitab Al-Aiman Wa Al-Nudhur) — Hadith No: 3271
Translation
A similar tradition has also been transmitted by 'Abd al-Rahman b. Abi Bakr through a different chain of narrators. This version adds on the authority of Salim:"Expiation (for breaking the oath) has not reached me