وَعَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ: ارْتَحَلَتِ الدُّنْيَا مُدْبِرَةً وَارْتَحَلَتِ الْآخِرَةُ مُقْبِلَةً وَلِكُلِّ وَاحِدَةٍ مِنْهُمَا بَنُونَ فَكُونُوا مِنْ أَبْنَاءِ الْآخِرَةِ وَلَا تَكُونُوا مِنْ أَبْنَاءِ الدُّنْيَا فَإِنَّ الْيَوْمَ عَمَلٌ وَلَا حِسَابَ وَغَدًا حِسَابٌ وَلَا عَمَلَ. رَوَاهُ البُخَارِيّ
It is narrated from Ali (may Allah be pleased with him), he said: The world is passing away while the Hereafter is coming, and each of them has seekers. You should be seekers of the Hereafter and not seekers of the world, because today is the time for action and not for reckoning, while tomorrow will be for reckoning and not for action. Narrated by al-Bukhari.