Du'a of deep gratitude

الْحَمْدُ للهِ رَبِّ الْعَالَمِينَ، حَمْدًا لِشُكْرِهِ أَدَاءً، وَلِحَقِّهِ قَضَاءً، وَلِحُبِّهِ رَجَاءً، وَلِفَضْلِهِ نَمَاءً، وَلِثَوَابِهِ عَطَاءً

Alhamdu lillahi rabbil-'alamin, hamdan lishukrihi ada'an, wa lihaqqihi qada'an, wa lihubbihi raja'an, wa lifadlihi nama'an, wa lithawabihi 'ata'an

All praise is due to Allah, the Lord of the worlds. Praise as an offering of thanks to Him, fulfilling His right, hoping for His love, acknowledging the growth of His bounty, and anticipating the gift of His reward.

A general supplication, not a narration from the Prophet (peace be upon him).