وَعَنْهُ أَيْضًا أَنَّهُ قَالَ فِي السُّجُودِ فِي ص: لَيْسَتْ مِنْ عَزَائِمِ السُّجُودِ وَقَدْ رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَسْجُدُ فِيهَا
It is also narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with him), he said regarding the prostration (sajdah) of Surah Sad: This is not among the obligatory prostrations, however, I have seen the Messenger of Allah (peace and blessings be upon him) performing its prostration.