Al-Kāfi

Hadith 802
oaths-vows
3- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ هِشَامِ بْنِ سَالِمٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ لا يَحْلِفُ الرَّجُلُ إِلا عَلَى عِلْمِهِ.
3. Ali ibn Ibrahim has narrated from his father from ibn abu ‘ Umayr from Hisham ibn Salim who has narrated the following: “Abu ‘Abd Allah (a.s.), has said, ‘A man must not be asked to take an oath except for what he knows.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī