Al-Kāfi
Hadith 15853- الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ أَبَانِ بْنِ عُثْمَانَ عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي عَبْدِ اللهِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنْ رَجُلٍ تَزَوَّجَ امْرَأَةً وَشَرَطَ عَلَيْهَا أَنْ يَأْتِيَهَا إِذَا شَاءَ وَيُنْفِقَ عَلَيْهَا شَيْئاً مُسَمًّى كُلَّ شَهْرٍ قَالَ لا بَأْسَ بِهِ.
3. Al-Husayn from Muhammad has narrated from Mu’alla’ ibn Muhammad from al-Hassan ibn Ali from Aban ibn ‘Uthman from ‘Abd al- Rahman ibn abu ‘Abd Allah who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a man who marries a woman with the condition to come to her whenever he wants and pays her an agreed upon amount every month. He (the Imam) said, ‘It is not unlawful.’”