Chapter on Oaths, Vows, and Expiations
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 38
وَ سَأَلَ عَلِيُّ بْنُ جَعْفَرٍ، أَخَاهُ مُوسَى بْنَ جَعْفَرٍ عَلَيْهِمَا اَلسَّلاَمُ: عَنِ اَلرَّجُلِ يَحْلِفُ وَ يَنْسَى مَا قَالَهُ قَالَ "هُوَ عَلَى مَا نَوَى".
Ali ibn Ja'far asked his brother Imam Musa ibn Jafar Al-Kadhim عليه السلام about a man who takes an oath and then forgets what he said. Imam عليه السلام replied: "It is based on what he intended."
- Ṣaḥīḥ al-Faqīh