307. hadíth
وَ سَأَلَ عَلِيُّ بْنُ جَعْفَرٍ أَخَاهُ مُوسَى بْنَ جَعْفَرٍ عَلَيْهِمَا اَلسَّلاَمُ: عَنِ اَلْمُكَاتَبِ هَلْ عَلَيْهِ فِطْرَةُ شَهْرِ رَمَضَانَ أَوْ عَلَى مَنْ كَاتَبَهُ وَ تَجُوزُ شَهَادَتُهُ قَالَ «اَلْفِطْرَةُ عَلَيْهِ وَ لاَ تَجُوزُ شَهَادَتُهُ.
Ali ibn Ja'far asked his brother Imam Musa ibn Jafar Al-Kadhim (a.s) about a mukatab (a slave who has a contract to earn their freedom): "Is Zakat al-Fitr obligatory upon the mukatab or upon the one who wrote the contract of emancipation for him? And is his testimony valid?" Imam (a.s) replied: "Zakat al-Fitr is obligatory upon him (the mukatab), but his testimony is not valid."