Suhayb ibn al-Nu’man reported: The Messenger of Allah, peace and blessings be upon him, said, “The voluntary prayer of a man in his house is better than his prayer where people can see him, just as the prescribed prayers are better than the voluntary prayers.”
Source: al-Mu’jam al-Kabīr lil-Ṭabarānī 7322
Grade: Hasan (fair) according to Al-Albani
عَنْ صُهَيْبِ بْنِ النُّعْمَانِ قَالَ قَالَ رَسُولُ اللهِ صَلَّى الله عَلَيْهِ وَسَلَّمْ فَضْلُ صَلَاةِ الرَّجُلِ فِي بَيْتِهِ عَلَى صَلَاتِهِ حَيْثُ يَرَاهُ النَّاسُ كَفَضْلِ الْمَكْتُوبَةِ عَلَى النَّافِلَةِ
8/46 المعجم الكبير للطبراني
4217 المحدث الألباني خلاصة حكم المحدث حسن في صحيح الجامع