Bulugh al-MaramChapter 2Hadith 640
Full Sharh — Bulugh al-Maram 640
وَزَادَ اَلْبُخَارِيُّ فِي "اَلْأَدَبِ اَلْمُفْرَدِ". { وَكَانَ يَلْبَسُهَا لِلْوَفْدِ وَالْجُمُعَةِ } 1 .1 - حسن. رواه البخاري في "الأدب المفرد" ص (127-128/رقم 348).
English Translation
al-Bukhari added in Adab al-Mufrad:: "He used to wear it on the visit of a delegation and on Fridays."
Source
Bulugh al-Maram(بلوغ المرام)
The Book of Prayer
Hadith Number
640