Mustawrid, a brother of Banu Fihr, said:
"I heard the Messenger ofAllah (ﷺ) say: 'The likeness of this world in comparison to theHereafter is that of anyone of you dipping his finger into the sea:let him see what he brings forth.'" (TR)
English reference (TR): Vol. 5, Book 37, Hadith 4108 (TR)
Arabic reference (TR): Book 37, Hadith 4247 (TR)