Hadith: O Allah, by You we have reached the morning, and by You we have reached the evening; by You we live, and by You we die, and to You is the Resurrection

عَنْ أَبِي هُرَيْرَةَ رضي الله عنه عَنِ النَّبِيِّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ:
أَنَّهُ كَانَ يَقُولُ إِذَا أَصْبَحَ: «اللهُمَّ بِكَ أَصْبَحْنَا، وَبِكَ أَمْسَيْنَا، وَبِكَ نَحْيَا، وَبِكَ نَمُوتُ، وَإِلَيْكَ النُّشُورُ» وَإِذَا أَمْسَى قَالَ: «بِكَ أَمْسَيْنَا، وَبِكَ أَصْبَحْنَا، وَبِكَ نَحْيَا، وَبِكَ نَمُوتُ، وَإِلَيْكَ النُّشُورُ» قَالَ: وَمَرَّةً أُخْرَى: «وَإِلَيْكَ الْمَصِيرُ».
[حسن] - [رواه أبو داود والترمذي والنسائي في الكبرى وابن ماجه] - [السنن الكبرى للنسائي: 10323]

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him):
Upon reaching the morning, he used to say: "O Allah, by You we have reached the morning, and by You we have reached the evening; by You we live, and by You we die, and to You is the Resurrection." Upon reaching the evening, he would say: "By You we have reached the evening, and by You we have reached the morning, by You we live, and by You we die, and to You is the resurrection." He said: And another time: "And to You is the final destination.".
[Good hadith] - - [Major Sunan of An-Nasa'i - 10323]

Explanation

Upon reaching the morning, i.e., the early part of the day, with the break of dawn, the Prophet (may Allah's peace and blessings be upon him) used to say:
(O Allah, by You we have reached the morning) enjoying Your protection, overwhelmed with Your Favor, preoccupied with remembering You, seeking help with Your name, encompassed by Your guidance, and proceeding with Your might and strength. (And by You we have reached the evening, by You we live, and by You we die), i.e., like the previous wording along with reciting it in the evening saying: O Allah, by You we have reached the evening. So, by Your name, the Bestower of Life, we live, and by Your name, the Bringer of Death, we die. (And to You is the Resurrection), the return to life after death, and the separation after assembly. We continue like this at all times and in all situations, and I will never stop or leave it.
Upon reaching the evening, right after ‘Asr, he would say: (O Allah, by You we have reached the evening, and by You we have reached the morning, by You we live, and by You we die, and to You is the final destination), the return in this world, and the return in the Hereafter, as it is You Who give me life and it is You Who cause me to die.