The Prophet ﷺ came in to her and there was a woman with her. He said: "Who is this?" She said: "So-and-so, and she does not sleep." And she told him about how she prayed a great deal. He said: "Stop praising her. You should do what you can, for by Allah (SWT), Allah never gets tired (of giving reward) until you get tired. And the most beloved of religious actions to Him is that in which a person persists." (Using translation from Nasāʾī 1642)
عَنِ النَّبِيِّ ﷺ دَخَلَ عَلَيْهَا وَعِنْدَهَا فُلَانَةُ لِامْرَأَةٍ فَذَكَرَتْ مِنْ صَلَاتِهَا فَقَالَ مَهْ عَلَيْكُمْ بِمَا تُطِيقُونَ فَوَاللهِ لَا يَمَلُّ اللهُ ﷻ حَتَّى تَمَلُّوا إِنَّ أَحَبَّ الدِّينِ إِلَى اللهِ مَا دَاوَمَ عَلَيْهِ صَاحِبُهُ