Hadithcore
Mishkat al-Masabih, 1367

‘Abdallah b. ‘Amr reported God's Messenger as saying, “Any Muslim who dies on Friday or on Thursday night will be protected by God from the testing in the grave." Ahmad and Tirmidhi transmitted it, the latter saying this is a <i>gharib</i> tradition whose <i>isnad</i> is not fully connected.

وَعَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا مِنْ مُسْلِمٍ يَمُوتُ يَوْمَ الْجُمُعَةِ أَوْ لَيْلَةَ الْجُمُعَةِ إِلَّا وَقَاهُ اللَّهُ فِتْنَةَ الْقَبْرِ» . رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ غَرِيبٌ وَلَيْسَ إِسْنَاده بِمُتَّصِل

References1 variant
In-Book Reference
Book 4, Hadith 772