Hadith 1018
۞
Even after receiving assurance of Paradise, the Messenger of Allāh - peace and blessing of Allāh be upon him and his descendants - used to exert himself for prayers because of Allāh, the Glorified’s command: “And enjoin prayer on thy followers, and adhere thou steadily unto it, ...” (Qur’ān, 20:132). Then the Holy Prophet used to enjoin his followers to prayer and exert himself for it.
وَكَانَ رَسُولُ اللهِ (صلى الله عليه وآله) نَصِباً بِالصَّلاَةِ بَعْدَ التَّبْشِيرِ لَهُ بِالْجَنَّةِ، لِقَوْلِ اللهِ سُبْحَانَهُ: ﴿وَأْمُرْ أَهْلَكَ بِالصَّلَاةِ وَاصْطَبِرْ عَلَيْهَا﴾، فَكَانَ يَأُمُرُ بِهَا أَهْلَهُ وَيَصْبِرُ عَلَيْهَا نَفْسَهُ.