Man Lā Yaḥḍuruh al-Faqīh
Hadith 12531261 - وَقَالَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ: «لاَ يَشْرَبْ أَحَدُكُمُ اَلدَّوَاءَ يَوْمَ اَلْخَمِيسِ » فَقِيلَ يَا أَمِيرَ اَلْمُؤْمِنِينَ وَ لِمَ ذَلِكَ قَالَ «لِئَلاَّ يَضْعُفَ عَنْ إِتْيَانِ اَلْجُمُعَةِ.
Hadith.1261 - The Commander of the Faithful Imam Ali ibn Abi Talib (as) said:
"None of you should take medicine on Thursday."
He was asked: "O’ Amir al-Mu'minin, why is that?"
Imam (as) said: "So that it does not weaken one from attending the Jumu’ah prayer."