من لا يحضره الفقيه, volume 1, page 126

Hadith.300 - Imam Jafar ibn Muhammad Al-Sadiq (as) said: "There are three things that can weaken and potentially destroy the body: eating dried meat excessively, entering the bathhouse on a full stomach, and marrying an elderly woman." It is also reported: "Intimacy on a full stomach."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.301 - Hisham ibn Salim narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) that He said: "Trimming the nails on Jumu’ah provides protection from leprosy, insanity, vitiligo, and blindness. If you do not need to trim them, then scrape or clean them."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.302 - In another report, it is stated: "If you do not need to trim them (your nails), then pass a knife or scissors over them."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.303 - Abd al-Rahim al-Qasir narrated from Imam Muhammad ibn Ali Al-Baqir (as), that He said: "Whoever trims their nails and mustache every Jumu’ah and says while doing so: Bismillāhi wa billāhi wa ‘alā sunnati Muḥammad wa āli Muḥammad ṣalawātu Allāhi ‘alayhim In the name of Allah (swt), and by Allah (swt), and upon the Sunnah of Muhammad and the family of Muhammad, may the blessings of Allah (swt) be upon them,' That no nail or hair clipping will fall except that Allah (swt), the Mighty and Glorious, will record it as freeing a soul, and such a person will not become ill except for the illness that causes their death."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.