اَللّٰهُمَّ رَبَّنَا لَكَ الْحَمْدُ.
Translation: O Allah, our Lord, to You Alone belongs all praise.
Transliteration: Allāhumma Rabbanā laka-l-ḥamd.
Virtue: The Messenger of Allah ﷺ said, “When the Imām says: سَمِعَ اللَّهُ لِمَنْ حَمِدَه say: اللهم ربنا لك الحمد, for indeed whoever coincides in saying this with the angels, his past sins will be forgiven.” (Bukhārī 796)