Al-Kāfi - Volume 5 > Conjugal Relation without Paying Mahr
Hadith #4

4- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنْ عَبْدِ الْحَمِيدِ بْنِ عَوَّاضٍ الطَّائِيِّ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنِ الرَّجُلِ يَتَزَوَّجُ الْمَرْأَةَ فَلا يَكُونُ عِنْدَهُ مَا يُعْطِيهَا فَيَدْخُلُ بِهَا قَالَ لا بَأْسَ إِنَّمَا هُوَ دَيْنٌ لَهَا عَلَيْهِ.

4. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from ‘Abd al-Hamid ibn ‘Awwad al-Ta’iy who has said the following: “This is concerning my question before abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a man who marries a woman and does not have anything to pay her and then goes to bed with her. He (the Imam) said, ‘It is not unlawful; it is a debt on him.’”