Mishkat al-Masabih
Mishkat al-Masabih 418
وَعَن عبد الله بن الْمُغَفَّل أَنه سمع ابْنه يَقُول: الله إِنِّي أَسْأَلُكَ الْقَصْرَ الْأَبْيَضَ عَنْ يَمِينِ الْجَنَّةِ قَالَ: أَيْ بُنَيَّ سَلِ اللَّهَ الْجَنَّةَ وَتَعَوَّذْ بِهِ مِنَ النَّارِ فَإِنِّي سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُول: «إِنَّه سَيكون فِي هَذِهِ الْأُمَّةِ قَوْمٌ يَعْتَدُونَ فِي الطَّهُورِ وَالدُّعَاءِ» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُدَ وَابْنُ مَاجَهْ
ʿAbd Allāh ibn al-Mughaffal heard his son say: ‘O Allah, I ask You for the white palace on the right side of Paradise.’ He said: ‘My son, ask Allah for Paradise and seek refuge in Him from the Fire. I heard the Messenger of Allah say: “There will be people in this community who transgress in purification and supplication.”’
Aḥmad, Abū Dāwūd, and Ibn Mājah transmitted it.