The Prophet ﷺ said, "The most superior way of asking for forgiveness from Allah is: 'Allahumma anta Rabbi la ilaha illa anta. Khalaqtani wa ana ʿAbduka, wa ana 'ala 'ahdika wa Wa'dika mastata'tu abu'u Laka bi ni 'matika wa abu'u Laka bidhanbi; faghfirli fa'innahu la yaghfiru-dh-dhunuba ill a ant a. A'uidhu bika min sharri ma sana'tu.' If somebody recites this invocation during the night, and if he should die then, he will go to Paradise (or he will be from the people of Paradise). And if he recites it in the morning, and if he should die on the same day, he will have the same fate."  

عَنِ النَّبِيِّ ﷺ قَالَ سَيِّدُ الاِسْتِغْفَارِ اللَّهُمَّ أَنْتَ رَبِّي لاَ إِلَهَ إِلاَّ أَنْتَ خَلَقْتَنِي وَأَنَا عَبْدُكَ وَأَنَا عَلَى عَهْدِكَ وَوَعْدِكَ مَا اسْتَطَعْتُ أَبُوءُ لَكَ بِنِعْمَتِكَ وَأَبُوءُ لَكَ بِذَنْبِي فَاغْفِرْ لِي فَإِنَّهُ لاَ يَغْفِرُ الذُّنُوبَ إِلاَّ أَنْتَ أَعُوذُ بِكَ مِنْ شَرِّ مَا صَنَعْتُ إِذَا قَالَ حِينَ يُمْسِي فَمَاتَ دَخَلَ الْجَنَّةَ أَوْ كَانَ مِنْ أَهْلِ الْجَنَّةِ وَإِذَا قَالَ حِينَ يُصْبِحُ فَمَاتَ مِنْ يَوْمِهِ مِثْلَهُ  

Whenever the Prophet ﷺ intended to go to bed, he would recite: "Bismika Allahumma amutu wa ahya (With Your name, O Allah, I die and I live)." And when he woke up from his sleep, he would say: "Al-hamdu lil-lahil-ladhi ahyana ba'da ma amatana; wa ilaihi an-nushur (All the Praises are for Allah Who has made us alive after He made us die (sleep) and unto Him is the Resurrection). "  

كَانَ النَّبِيُّ ﷺ إِذَا أَرَادَ أَنْ يَنَامَ قَالَ بِاسْمِكَ اللَّهُمَّ أَمُوتُ وَأَحْيَا وَإِذَا اسْتَيْقَظَ مِنْ مَنَامِهِ قَالَ الْحَمْدُ لِلَّهِ الَّذِي أَحْيَانَا بَعْدَ مَا أَمَاتَنَا وَإِلَيْهِ النُّشُورُ  

Whenever the Prophet ﷺ lay on his bed, he used to say: "Allahumma bismika amutu wa ahya," and when he woke up he would say: "Al-hamdu lil-lahilladhi ahyana ba'da ma an atana, wa ilaihi an-nushur."  

كَانَ النَّبِيُّ ﷺ إِذَا أَخَذَ مَضْجَعَهُ مِنَ اللَّيْلِ قَالَ اللَّهُمَّ بِاسْمِكَ أَمُوتُ وَأَحْيَا فَإِذَا اسْتَيْقَظَ قَالَ الْحَمْدُ لِلَّهِ الَّذِي أَحْيَانَا بَعْدَ مَا أَمَاتَنَا وَإِلَيْهِ النُّشُورُ