حَدَّثَنَا هُشَيْمٌ أَخْبَرَنَا مَنْصُورٌ عَنِ ابْنِ سِيرِينَ أَنَّ جَنَازَةً مَرَّتْ بِالْحَسَنِ وَابْنِ عَبَّاسٍ فَقَامَ الْحَسَنُ وَلَمْ يَقُمْ ابْنُ عَبَّاسٍ فَقَالَ الْحَسَنُ لِابْنِ عَبَّاسٍ أَقَامَ لَهَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ قَامَ وَقَعَدَ
مسند امام احمد بن حنبل · Hadith 3126
It was narrated from Ibn Sireen that a funeral passed by al- Hasan and Ibn 'Abbas; al-Hasan stood up and Ibn 'Abbas did not. Al-Hasan said to Ibn 'Abbas: Didn't the Messenger of Allah (PBUH) stand up (for funerals)”. He said: He stood up (sometimes) and he remained seated (sometimes).
Sanad
حَدَّثَنَا هُشَيْمٌ أَخْبَرَنَا مَنْصُورٌ عَنِ ابْنِ سِيرِينَ أَنَّ جَنَازَةً مَرَّتْ بِالْحَسَنِ وَابْنِ عَبَّاسٍ فَقَامَ الْحَسَنُ وَلَمْ يَقُمْ ابْنُ عَبَّاسٍ فَقَالَ الْحَسَنُ لِابْنِ عَبَّاسٍ