Sayyiduna Ibn Abbas (may Allah be pleased with them both) relates that Sayyiduna Sa'd bin Ubadah (may Allah be pleased with him) sought a ruling from the Messenger of Allah (peace and blessings be upon him) about fulfilling a vow that was due from his mother, and the Messenger of Allah (peace and blessings be upon him) ordered him to fulfil it on her behalf.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5354