Sunan Ibn Majah
875
Sahih+3

It was narrated from Abu Hurairah that when the Messenger of Allah (ﷺ) said:“Sami’ Allahu liman hamidah (Allah hears those who praise Him),” he said: “Rabbana wa lakal-hamd (O our Lord, to You is the praise).”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi