بُلُوغُ الْمَرَامِ
Bulugh al-Maram 165
The Book of Prayer
حَدِيثِ أَبِي هُرَيْرَةَ بِسَنَدٍ ضَعِيفٍ. وَزَادَ: { إِلَّا يَوْمَ اَلْجُمْعَةِ } [1] .
A Hadith narrated by Abu Hurairah (RA) through a weak Sanad with the addition: "Except on Friday".
Sunnah.com reference: Book 2, Hadith 17