once
رَبَّنَا وَلَكَ الْحَمْدُ، حَمْداً كَثيراً طَيِّباً مُبارَكاً فِيهِ
Edition transliteration
Rabbana walakal-hamdu hamdan katheeran tayyiban mubarakan feeh.
Meaning
Our Lord, for You is all praise, an abundant beautiful blessed praise.
Source and references
Hisn al-Muslim, entry 39.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗