Jami` at-Tirmidhi 704
جامع الترمذي#704Sahihحَدَّثَنَا هَنَّادٌ، حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامٍ، بِنَحْوِهِ إِلاَّ أَنَّهُ قَالَ قَدْرُ قِرَاءَةِ خَمْسِينَ آيَةً . قَالَ وَفِي الْبَابِ عَنْ حُذَيْفَةَ . قَالَ أَبُو عِيسَى حَدِيثُ زَيْدِ بْنِ ثَابِتٍ حَدِيثٌ حَسَنٌ صَحِيحٌ . وَبِهِ يَقُولُ الشَّافِعِيُّ وَأَحْمَدُ وَإِسْحَاقُ اسْتَحَبُّوا تَأْخِيرَ السُّحُورِ .
Anas (bin Malik) narrated:(Another chain) except that he said: "About the length for reciting fifty Ayahs
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:
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih Muslim
In-book reference: 8:23