What to say when waking up or when going to sleep

from the Prophet ﷺ, that when he entered the morning he would say:

allāhumma bika aṣbaḥnā, wa-bika amsaynā, wa-bika naḥyā, wa-bika namūtu, wa-ilayka al-maṣīr

(O Allah, by You we enter the morning, by You we enter the evening, by You we live, by You we die, and to You is the resurrection.)

And when he entered the evening he would say:

allāhumma bika amsaynaā, wa-bika naḥyā, wa-bika namūtu, wa-ilayka al-nushūr

(O Allah, by You we enter the evening, by You we live, by You we die, and to You is the resurrection.)

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ يَقُولُ إِذَا أَصْبَحَ:

«اللَّهُمَّ بِكَ أَصْبَحْنَا وَبِكَ أَمْسَيْنَا وَبِكَ نَحْيَا وَبِكَ نَمُوتُ وَإِلَيْكَ النُّشُورُ»

وَإِذَا أَمْسَى قَالَ:

«اللَّهُمَّ بِكَ أَمْسَيْنَا وَبِكَ نَحْيَا وَبِكَ نَمُوتُ وَإِلَيْكَ النُّشُورُ».

The Messenger of Allah ﷺ used to teach his Companions, saying: “When one of you reached the morning, then let him say: ‘O Allah, by You we enter the morning, and by You we enter the evening, and be You we live, and by You we died, and to You is the Return (Allāhumma bika aṣbaḥnā wa bika amsainā wa bika naḥyā wa bika namūtu wa ilaikal-maṣīr). And when he reaches the evening let him say: ‘O Allah, by You we enter the evening, and by You we enter the morning, and by You we live, and by You we die, and to You is the Resurrection (Allāhumma bika amsainā wa bika aṣbaḥnā wa bika naḥyā wa bika namūtu wa ilaikan-nushūr).’”

كَانَ رَسُولُ اللَّهِ ﷺ يُعَلِّمُ أَصْحَابَهُ يَقُولُ إِذَا أَصْبَحَ أَحَدُكُمْ فَلْيَقُلِ اللَّهُمَّ بِكَ أَصْبَحْنَا وَبِكَ أَمْسَيْنَا وَبِكَ نَحْيَا وَبِكَ نَمُوتُ وَإِلَيْكَ الْمَصِيرُ وَإِذَا أَمْسَى فَلْيَقُلِ اللَّهُمَّ بِكَ أَمْسَيْنَا وَبِكَ أَصْبَحْنَا وَبِكَ نَحْيَا وَبِكَ نَمُوتُ وَإِلَيْكَ النُّشُورُ

the Messenger of Allah (saas) said: "In the morning say: 'Allahumma bika asbahna, wa bika amsayna, wa bika nahya, wa bika namut (O Allah, by Your leave we have reached the morning and by Your leave we reach the evening, and by Your leave we live and by Your leave we die). And when evening comes, say: Allahumma bika amsayna, wa bika asbahna, wa bika nahya, wa bika namut, wa ilaykal-masir (O Allah, by Your leave we have reached the evening and by Your leave we reach the morning, and by Your leave we live and by Your leave we die, and unto You is our return)."

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَصْبَحْتُمْ فَقُولُوا اللَّهُمَّ بِكَ أَصْبَحْنَا وَبِكَ أَمْسَيْنَا وَبِكَ نَحْيَى وَبِكَ نَمُوتُ وَإِذَا أَمْسَيْتُمْ فَقُولُوا اللَّهُمَّ بِكَ أَمْسَيْنَا وَبِكَ أَصْبَحْنَا وَبِكَ نَحْيَى وَبِكَ نَمُوتُ وَإِلَيْكَ الْمَصِيرُ