وَعَن كَعْب بن عجْرَة
قَالَ: إِنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَتَى مَسْجِدَ بَنِي عَبْدِ الْأَشْهَلِ فَصَلَّى فِيهِ الْمَغْرِبَ فَلَمَّا قَضَوْا صَلَاتَهُمْ رَآهُمْ يُسَبِّحُونَ بَعْدَهَا فَقَالَ: «هَذِهِ صَلَاةُ الْبُيُوتِ» وَفِي رِوَايَةِ التِّرْمِذِيِّ وَالنَّسَائِيِّ قَامَ نَاسٌ يَتَنَفَّلُونَ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «عَلَيْكُمْ بِهَذِهِ الصَّلَاة فِي الْبيُوت»
The Prophet (sallallahu alayhi wa sallam) came to the mosque of the B. Abd al-Ashhal and prayed the sunset prayer in it. When the people finished their prayer he saw them performing tasbih after it and said, “This is the prayer to be observed at home.”* * This refers to supererogatory prayers. Tasbih is the utterance of ‘Glory be to God!’ Abu Dawud transmitted it.
In the version by Tirmidhi and Nasai it says that the people got up and offered supererogatory prayers, whereupon the Prophet (sallallahu alayhi wa sallam) said, “Observe this prayer at home.”