Allah put the night and the day in succession, for such who desires to remember Him, contemplates on the difference between them, thanking and show gratitude to Him.‎

 

وَاذْكُر رَّبَّكَ فِي نَفْسِكَ تَضَرُّعًا وَخِيفَةً وَدُونَ الْجَهْرِ مِنَ الْقَوْلِ بِالْغُدُوِّ وَالْآصَالِ وَلَا تَكُن مِّنَ الْغَافِلِينَ

205. And remember your Lord within yourself, humbly and with fear and without loudness in words in the mornings, and in the afternoons and be not of those who are neglectful.

Souce: al-Hilâlî & Muhsin Khân Translation, Noble Qur'ân, Sûrah 7. Al-A’râf, Ayâh 205, Part 9, page. 230