أَصْبَحْنَا وَأَصْبَحَ الْمُلْكُ لِلَّهِ، وَالْحَمْدُ لِلَّهِ، لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ، رَبِّ أَسْأَلُكَ خَيْرَ مَا فِي هَذَا الْيَوْمِ وَخَيْرَ مَا بَعْدَهُ، وَأَعُوذُ بِكَ مِنْ شَرِّ مَا فِي هَذَا الْيَوْمِ وَشَرِّ مَا بَعْدَهُ
Transliteration
Asbahna wa asbahal-mulku lillahi, walhamdu lillahi, la ilaha illallahu wahdahu la sharika lahu, lahul-mulku wa lahul-hamdu wa huwa 'ala kulli shay'in qadirun, Rabbi as'aluka khayra ma fi hadhal-yawmi wa khayra ma ba'dahu, wa a'udhu bika min sharri ma fi hadhal-yawmi wa sharri ma ba'dah
English meaning
We have reached the morning and at this very time all sovereignty belongs to Allah. Praise is to Allah. None has the right to be worshipped except Allah, alone without partner. To Him belongs all sovereignty and praise, and He is over all things omnipotent. My Lord, I ask You for the good of this day and the good of what follows it, and I seek refuge in You from the evil of this day and the evil of what follows it.
When is it recited?
Recited in the morning. For evening, replace 'asbahnā' with 'amsaynā' and 'yawm' with 'laylah'.
Source
Muslim, Dhikr 75, 2723