The Prophet ﷺ used to pray two rakahs after the Friday prayer.
حدثنا سفيان عن عمرو عن الزهري
أن النبي ﷺ كان يصلي بعد الجمعة ركعتين
No references are available.
Its isnad is sahih. His statement "between them is Salim" means that Zuhri narrated it from Salim, from Ibn Umar, not directly from Ibn Umar. Likewise, Tirmidhi 1:370 narrated it from Ibn Abu Umar, from Sufyan bin Uyayna, from Amr bin Dinar, from Zuhri, from Salim, from Ibn Umar, with the same wording. Tirmidhi said, the hadith of Ibn Umar is a hasan sahih hadith.Abu Dawud 1:440 narrated it through the route of Abdul-Razzaq, from Maamar, from Zuhri, from Salim, from Ibn Umar, adding at the end "in his house." Munziri said, Tirmidhi, Nasai, and Ibn Majah also transmitted it... but Tirmidhi's hadith does not contain "in his house."Bukhari and Muslim and others narrated it through the route of Nafi, from Ibn Umar. See al-Muntaqa 1640, and see what has preceded at 4506, and what will come at 4660.