And Allah says:

وَسَبِّحُوهُ بُكْرَةً وَأَصِيلًا ﴿٤٢﴾

And glorify His praises morning and Asila.

If you do this, He and His angels will send blessings upon you.''

There are very many Ayat, Hadiths and reports which encourage the remembrance of Allah, and this Ayah urges us to remember Him much. People such as An-Nasa'i and Al-Ma`mari and others have written books about the Adhkar to be recited at different times of the night and day.

وَسَبِّحُوهُ بُكْرَةً وَأَصِيلًا

And glorify His praises morning and Asila.

in the morning and in the evening.

This is like the Ayah:

فَسُبْحَانَ اللَّهِ حِينَ تُمْسُونَ وَحِينَ تُصْبِحُونَ

وَلَهُ الْحَمْدُ فِى السَّمَـوَتِ وَالاٌّرْضِ وَعَشِيّاً وَحِينَ تُظْهِرُونَ

So glorify Allah, when you come up to the evening, and when you enter the morning. And His are all the praises and thanks in the heavens and the earth; and in the afternoon and when you come up to the time, when the day begins to decline. (30:17-18)