The Statement of Allah the Exalted: "...And glorify the praises of your Lord, before the rising of the sun and before (its) setting (i.e., the Fajr, Ẓuhr and 'Aṣr prayers) ." (V.50:39)
حَدَّثَنَا آدَمُ، حَدَّثَنَا وَرْقَاءُ، عَنِ ابْنِ أَبِي نَجِيحٍ، عَنْ مُجَاهِدٍ، قَالَ ابْنُ عَبَّاسٍ أَمَرَهُ أَنْ يُسَبِّحَ، فِي أَدْبَارِ الصَّلَوَاتِ كُلِّهَا. يَعْنِي قَوْلَهُ {وَأَدْبَارَ السُّجُودِ}
Narrated Mujahid: Ibn `Abbas said, "Allah ordered His Prophet to celebrate Allah's praises after all prayers." He refers to His Statement: 'After the prayers.' (50.40)