Arabic (Original)
قَالَ رَسُولُ اللهِ ﷺ سَجَدَهَا دَاوُدُ عَلَيْهِ السَّلَامُ لِتَوْبَةٍ وَنَسْجُدُهَا نَحْنُ شُكْرًا يَعْنِي ص أَخْبَرَنَاهُ الْإِمَامُ الشَّرِيفُ أَبُو الْفَتْحِ الْعُمَرِيُّ أنبأ أَبُو الْحَسَنِ بْنُ فِرَاسٍ ثنا ��َبُو مُحَمَّدِ بْنُ الْمُقْرِئِ ثنا جَدِّي ثنا سُفْيَانُ فَذَكَرَهُ هَذَا هُوَ الْمَحْفُوظُ مُرْسَلًا وَقَدْ رُوِيَ مِنْ أَوْجُهٍ عَنْ عُمَرَ بْنِ ذَرٍّ عَنْ أَبِيهِ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ مَوْصُولًا وَلَيْسَ بِقَوِيٍّ البيهقي ٣٧٤١: عن
English Translation
The Messenger of Allah (peace be upon him) said: Dawud (peace be upon him) prostrated it as repentance, and we prostrate it as gratitude - meaning Surah Sad. This is what is preserved as mursal. It was also narrated through various chains from Umar ibn Dharr from his father from Sa'id ibn Jubayr from Ibn Abbas as connected, but it is not strong.