Sahih Muslim 1992
صحيح مسلم#1992Sahihوَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالاَ أَخْبَرَنَا وَكِيعٌ، عَنْ يَعْلَى بْنِ، الْحَارِثِ الْمُحَارِبِيِّ عَنْ إِيَاسِ بْنِ سَلَمَةَ بْنِ الأَكْوَعِ، عَنْ أَبِيهِ، قَالَ كُنَّا نُجَمِّعُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم إِذَا زَالَتِ الشَّمْسُ ثُمَّ نَرْجِعُ نَتَتَبَّعُ الْفَىْءَ .
Iyas b. Salama b. al-Akwa' reported on the authority of his father:We used to observe the Friday prayer with the Messenger of Allah (ﷺ) when the sun passed the meridian. and we then returned and tried to find out afternoon shadow (of the walls for protecting themselves from the heat of the sun)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 7:42