Jami` at-Tirmidhi 1098
جامع الترمذي#1098Sahihحَدَّثَنَا أَبُو سَلَمَةَ، يَحْيَى بْنُ خَلَفٍ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ، عَنْ إِسْمَاعِيلَ بْنِ أُمَيَّةَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " ائْتُوا الدَّعْوَةَ إِذَا دُعِيتُمْ " . قَالَ وَفِي الْبَابِ عَنْ عَلِيٍّ وَأَبِي هُرَيْرَةَ وَالْبَرَاءِ وَأَنَسٍ وَأَبِي أَيُّوبَ . قَالَ أَبُو عِيسَى حَدِيثُ ابْنِ عُمَرَ حَدِيثٌ حَسَنٌ صَحِيحٌ .
Ibn Umar narrated that:The Messenger of Allah said: "Accept the invitation when you are offered
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Ahmad Muhammad Shakir, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 11:19