Reference : Hisn al-Muslim 78

اللّهُـمَّ بِكَ أَصْـبَحْنا وَبِكَ أَمْسَـينا
وَبِكَ نَحْـيا وَبِكَ نَمـوتُ
وَإِلَـيْكَ النِّـشور
وإذا أمسي فليقل :
اللهم بك أمسينا وبك أصبحنا
وبك نحيا وبك نموت
وإليك المصير
Allāhumma bika aṣbaḥnā, 
wa bika amsaynā, 
wa bika naḥyā, wa bika namūt, 
wa ilaykan-nushūr.
 
When you say this in the evening you should say: 
Allāhumma bika amsaynā wa bika aṣbaḥnā, 
wa bika naḥyā, wa bika namūt, 
wa ilaykal-maṣīr 

O Allah, by You we enter the morning and by You we enter the evening,
by You we live and by You we die, 
and to You is the Final Return.

O Allah, You bring us the end of the day as You bring us its beginning, 
You bring us life and you bring us death,
and to You is our fate.

Reference:
Sahih At-Tirmidhi 3/142.'

Chapter: In the morning and evening