Reference : Hisn al-Muslim 81

اللّهُـمَّ ما أَصْبَـَحَ بي مِـنْ نِعْـمَةٍ 
أَو بِأَحَـدٍ مِـنْ خَلْـقِك ، 
فَمِـنْكَ وَحْـدَكَ لا شريكَ لَـك ،
فَلَـكَ الْحَمْـدُ وَلَـكَ الشُّكْـر
Allāhumma mā aṣbaha bī min ni`matin 
aw bi aḥadin min khalqik, 
fa minka waḥdaka lā sharīka lak, 
falaka ‘l-ḥamdu wa lakash-shukr.


O Allah, whatever blessing has been received by me or anyone of Your creation 1 
is from You alone, You have no partner. 
All praise is for you and thanks is to You. 2

Reference:
1 When you say this in the evening, you should say: Allāhumma mā 'amsā bī...: "O Allah, as I... enter this evening..."
2 Whoever recites this in the morning, has completed his obligation to thank Allah for that day; and whoever says it in the evening, has completed his obligation for that night. Abu Dawud 4/318, An-Nasa'i 'Amalul-Yawm wal-Laylah (no. 7), Ibn As-Sunni (no. 41), Ibn Hibban (no. 2361). Its chain of transmission is good (Hasan), Ibn Baz, p. 24.

Chapter: In the morning and evening