The Prophet ﷺ said: If anyone says in the morning: "O Allah! whatever favour has come to me, it comes from Thee alone Who has no partner; to Thee praise is due and thanksgiving,'! he will have expressed full thanksgiving for the day; and if anyone says the same in the evening, he will have expressed full thanksgiving for the night.
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ قَالَ حِينَ يُصْبِحُ اللَّهُمَّ مَا أَصْبَحَ بِي مِنْ نِعْمَةٍ فَمِنْكَ وَحْدَكَ لاَ شَرِيكَ لَكَ فَلَكَ الْحَمْدُ وَلَكَ الشُّكْرُ فَقَدْ أَدَّى شُكْرَ يَوْمِهِ وَمَنْ قَالَ مِثْلَ ذَلِكَ حِينَ يُمْسِي فَقَدْ أَدَّى شُكْرَ لَيْلَتِهِ