Surah Al-A'raf, Verse 205

وَٱذۡكُر رَّبَّكَ فِي نَفۡسِكَ تَضَرُّعٗا وَخِيفَةٗ وَدُونَ ٱلۡجَهۡرِ مِنَ ٱلۡقَوۡلِ بِٱلۡغُدُوِّ وَٱلۡأٓصَالِ وَلَا تَكُن مِّنَ ٱلۡغَٰفِلِينَ٢٠٥

wa-udh'kur rabbaka fī nafsika taḍarruʿan wakhīfatan wadūna l-jahri mina l-qawli bil-ghuduwi wal-āṣāli walā takun mina l-ghāfilīna

And remember your Lord within yourself in humility and in fear without being apparent in speech - in the mornings and the evenings. And do not be among the heedless.