Surah Al-Baqarah, Verse 152

فَٱذۡكُرُونِيٓ أَذۡكُرۡكُمۡ وَٱشۡكُرُواْ لِي وَلَا تَكۡفُرُونِ١٥٢

fa-udh'kurūnī adhkur'kum wa-ush'kurū lī walā takfurūni

So remember Me; I will remember you. And be grateful to Me and do not deny Me.