Abdullah heard his son praying to Allah: O Allah, I ask Thee a white palace on the right of Paradise when I enter it. He said: O my son, ask Allah for Paradise and seek refuge in Him from Hell-Fire, for I heard the Messenger of Allah ﷺ say: In this community there will be some people who will exceed the limits in purification as well as in supplication. (Using translation from Abū Dāʾūd 96)
سَمِعَ ابْنًا لَهُ يَقُولُ اللهُمَّ إِنِّي أَسْأَلُكَ الْقَصْرَ الْأَبْيَضَ مِنَ الْجَنَّةِ إِذَا دَخَلْتُهَا عَنْ يَمِينِي قَالَ فَقَالَ لَهُ يَا بُنَيَّ سَلِ اللهَ الْجَنَّةَ وَتَعَوَّذْهُ مِنَ النَّارِ فَإِنِّي سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ سَيَكُونُ بَعْدِي قَوْمٌ مِنْ هَذِهِ الْأُمَّةِ يَعْتَدُونَ فِي الدُّعَاءِ وَالطَّهُورِ