Chapter on Freedom
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 1|Chapter 51
وَ رَوَى طَلْحَةُ بْنُ زَيْدٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَلَيْهِ اَلسَّلاَمُ: فِي رَجُلٍ أَعْتَقَ بَعْضَ مَمْلُوكِهِ قَالَ "هُوَ حُرٌّ كُلُّهُ لَيْسَ لِلَّهِ عَزَّ وَ جَلَّ شَرِيكٌ".
It is narrated by Talhah bin Zayd, from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام from his father, Imam Muhammad ibn Ali Al-Baqir عليه السلام, peace be upon him, regarding a man who freed part of his slave. Imam عليه السلام said: "He is completely free; there is no partner with Allah سبحانه وتعالى, the Almighty."
- Ṣaḥīḥ al-Faqīh, p. 208