I heard Mustawrid, a member of Banu Fihr, saying: The Messenger of Allah ﷺ said: "The world compared to the Hereafter is but like what one of you gets when placing his finger into the sea, so look at what you draw from it."  

قَالَ رَسُولُ اللَّهِ ﷺ مَا الدُّنْيَا فِي الآخِرَةِ إِلاَّ مِثْلُ مَا يَجْعَلُ أَحَدُكُمْ إِصْبَعَهُ فِي الْيَمِّ فَلْيَنْظُرْ بِمَاذَا يَرْجِعُ