We Have Entered the Evening and the Kingdom Belongs to Allah
أَمْسَيْنَا وَأَمْسَى الْمُلْكُ لِلَّهِ، وَالْحَمْدُ لِلَّهِ، لَا إِلَٰهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ، رَبِّ أَسْأَلُكَ خَيْرَ مَا فِي هَٰذِهِ اللَّيْلَةِ وَخَيْرَ مَا بَعْدَهَا، وَأَعُوذُ بِكَ مِنْ شَرِّ مَا فِي هَٰذِهِ اللَّيْلَةِ وَشَرِّ مَا بَعْدَهَا، رَبِّ أَعُوذُ بِكَ مِنَ الْكَسَلِ وَسُوءِ الْكِبَرِ، رَبِّ أَعُوذُ بِكَ مِنْ عَذَابٍ فِي النَّارِ وَعَذَابٍ فِي الْقَبْرِ
Amsayna wa amsal-mulku lillah, wal-hamdu lillah, la ilaha illallahu wahdahu la sharika lah, lahul-mulku wa lahul-hamdu wa huwa 'ala kulli shay'in qadir. Rabbi as'aluka khayra ma fi hadhihil-laylati wa khayra ma ba'daha, wa a'udhu bika min sharri ma fi hadhihil-laylati wa sharri ma ba'daha. Rabbi a'udhu bika minal-kasali wa su'il-kibar. Rabbi a'udhu bika min 'adhabin fin-nari wa 'adhabin fil-qabr.
We have entered the evening and the kingdom belongs to Allah, and all praise is for Allah. There is no god but Allah alone, with no partner. To Him belongs the kingdom, to Him belongs all praise, and He is able to do all things. My Lord, I ask You for the good of this night and the good of what comes after it, and I take refuge with You from the evil of this night and the evil of what comes after it. My Lord, I take refuge with You from laziness and from a wretched old age. My Lord, I take refuge with You from punishment in the Fire and punishment in the grave.
What it means
The evening twin of the morning dua, with night in place of day. It closes the day the same way it opened: the kingdom is His, the good you want is from Him, and the harm you fear is under His control. Saying both makes a full circle around your waking hours.
When and how
Say it once after Asr or Maghrib, whichever suits your routine, before the night gets busy.
Its virtue
The Prophet ﷺ said this wording when evening came, in the same narration of Ibn Mas'ud reported in Sahih Muslim 2723.
Source
Muslim 2723sahih