148. hadíth
وَ قَالَ أَبُو جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ: "تَزَوَّجِ اَلْأَمَةَ عَلَى اَلْأَمَةِ وَ لاَ تَزَوَّجِ اَلْأَمَةَ عَلَى اَلْحُرَّةِ وَ تَزَوَّجِ اَلْحُرَّةَ عَلَى اَلْأَمَةِ فَإِنْ تَزَوَّجْتَ اَلْحُرَّةَ عَلَى اَلْأَمَةِ فَلِلْحُرَّةِ اَلثُّلُثَانِ وَ لِلْأَمَةِ اَلثُّلُثُ وَ لَيْلَتَانِ وَ لَيْلَةٌ".
Abu Ja'far Imam Muhammad ibn Ali Al-Baqir (a.s) said: "Marry a bondwoman alongside another bondwoman, but do not marry a bondwoman alongside a free woman. However, you may marry a free woman alongside a bondwoman. If you marry a free woman alongside a bondwoman, then the free woman is entitled to two-thirds, and the bondwoman to one-third, of both your wealth and your time, two nights for the free woman and one night for the bondwoman."