What was narrated concerning (voluntary) Prayers at night and during the day are two by two
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا شَبَابَةُ بْنُ سَوَّارٍ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنِي عَبْدُ رَبِّهِ بْنُ سَعِيدٍ، عَنْ أَنَسِ بْنِ أَبِي أَنَسٍ، عَنْ عَبْدِ اللَّهِ بْنِ نَافِعِ بْنِ الْعَمْيَاءِ، عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ، عَنِ الْمُطَّلِبِ، - يَعْنِي ابْنَ أَبِي وَدَاعَةَ - قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " صَلاَةُ اللَّيْلِ مَثْنَى مَثْنَى. وَتَشَهَّدُ فِي كُلِّ رَكْعَتَيْنِ. وَتَبَاءَسُ وَتَمَسْكَنُ وَتُقْنِعُ. وَتَقُولُ: اللَّهُمَّ اغْفِرْ لِي. فَمَنْ لَمْ يَفْعَلْ ذَلِكَ، فَهِيَ خِدَاجٌ " .
It was narrated that Muttalib that is, Ibn Abu Wada’ah said: “The Messenger of Allah (ﷺ) said: ‘The night prayers are (to be offered) two by two. Say the Tashah-hud after each two Rak`ah, and raise your hands in all humility like one who is poor and needy and say: ‘Allāhummaghfir lī (O Allah, forgive me).’ And whoever does not do that, it is imperfect.’”