Once the Prophet ﷺ came while a woman was sitting with me. He said, "Who is she?" I replied, "She is so and so," and told him about her (excessive) praying. He said disapprovingly, "Do (good) deeds which is within your capacity (without being overtaxed) as Allah does not get tired (of giving rewards) but (surely) you will get tired and the best deed (act of Worship) in the sight of Allah is that which is done regularly." (Using translation from Bukhārī 43)
أَنَّ النَّبِيَّ ﷺ دَخَلَ عَلَيْهَا وَعِنْدَهَا امْرَأَةٌ فَقَالَ مِنْ هَذِهِ؟ قَالَتْ فُلَانَةُ لَا تَنَامُ تَذْكُرُ مِنْ صَلَاتِهَا فَقَالَ «مَهْ عَلَيْكُمْ بِمَا تُطِيقُونَ فَوَاللهِ لَا يَمَلُّ اللهُ حَتَّى تَمَلُّوا وَلَكِنْ أَحَبُّ الدِّينِ إِلَيْهِ مَا دَامَ عَلَيْهِ صَاحِبُهُ»