Al-Kāfi

Hadith 1204
expiation
6ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنْ أَبِي الْمَغْرَاءِ عَنْ سُلَيْمَانَ بْنِ خَالِدٍ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلاَم) يَقُولُ فِي الْجِدَالِ شَاةٌ وَفِي السِّبَابِ وَالْفُسُوقِ بَقَرَةٌ وَالرَّفَثِ فَسَادُ الْحَجِّ.
6. A number of our people have narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Fadalah ibn Ayyub from abu al- Mighra’ from Sulayman ibn Khalid who has said the following: “I once heard abu ‘Abd Allah (a.s.), say, ‘The expiation for abusing and swearing is a cow and because of sexual relation al-Hajj becomes invalid.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī