Qur'an 50:39

فَٱصْبِرْ عَلَىٰ مَا يَقُولُونَ وَسَبِّحْ بِحَمْدِ رَبِّكَ قَبْلَ طُلُوعِ ٱلشَّمْسِ وَقَبْلَ ٱلْغُرُوبِ

Therefor (O Muhammad) bear with what they say, and hymn the praise of thy Lord before the rising and before the setting of the sun;