Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Allah the Exalted says: 'I am as my slave expects me to be, and I am with him when he remembers Me. If he remembers Me inwardly, I will remember him inwardly, and if he remembers Me in an assembly, I will remember him in a better assembly (i.e., in the assembly of angels)."[Al-Bukhari and Muslim].
App reference: Book 16, Hadith 28
Arabic/English book reference: Book 16, Hadith 1435