Al-Kāfi

Hadith 1181
7ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ زُرَارَةَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ هُوَ حِلٌّ إِذَا حُبِسَ اشْتَرَطَ أَوْ لَمْ يَشْتَرِطْ.
7. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad ibn ‘Uthman from Zurarah who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘He is free as he is withheld, whether he makes such stipulation or not.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī