The morning gratitude dua is: 'Allahumma ma asbaha bi min ni'matin aw bi ahadin min khalqika fa minka wahdaka la sharika lak, falakal-hamdu wa lakash-shukr.' Whoever says this in the morning has fulfilled the gratitude of that day for Allah's blessings.
اللَّهُمَّ مَا أَصْبَحَ بِي مِنْ نِعْمَةٍ أَوْ بِأَحَدٍ مِنْ خَلْقِكَ فَمِنْكَ وَحْدَكَ لَا شَرِيكَ لَكَ، فَلَكَ الْحَمْدُ وَلَكَ الشُّكْرُ
Allahumma ma asbaha bi min ni'matin aw bi ahadin min khalqika fa minka wahdaka la sharika lak, falakal-hamdu wa lakash-shukr.
Meaning: O Allah, whatever blessing I or any of Your creation have risen upon this morning is from You alone, without partner. So for You is all praise and to You is all gratitude.
Source: Sunan Abu Dawud #5073Hz. Peygamber (sallallahu aleyhi ve sellem) said that whoever recites bu dua in the morning has fulfilled the gratitude due for that entire day. It is a profound yet simple way to acknowledge that every blessing — whether enjoyed personally or observed in others — originates from Allah alone.
اللَّهُمَّ مَا أَصْبَحَ بِي مِنْ نِعْمَةٍ أَوْ بِأَحَدٍ مِنْ خَلْقِكَ فَمِنْكَ وَحْدَكَ لَا شَرِيكَ لَكَ، فَلَكَ الْحَمْدُ وَلَكَ الشُّكْرُ
The Messenger of Allah (peace be upon him) said: 'Whoever says in the morning: Allahumma ma asbaha bi min ni'matin aw bi ahadin min khalqika fa minka wahdaka la sharika lak, falakal-hamdu wa lakash-shukr — he has fulfilled the gratitude of that day. And whoever says it in the evening has fulfilled the gratitude of that night.'