(Ahsaab) 33 : 41
يَا أَيُّهَا الَّذِينَ آمَنُوا اذْكُرُوا اللَّهَ ذِكْرًا كَثِيرًا

Oh you believed! You remember Lord much remembrance.

See explanation 2: 152; 13: 28; 33: 35.