Al-Imām ibn al-Qayyim [may Allāh have mercy on him] said:
“Actions without sincerity and [actions] which do not follow the example of the Sunnah [of the Messenger of Allāh صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ] are like a traveller who fills his sack with sand, he carries its heavy weight, yet it does not benefit him [whatsoever].”
Al-Fawā’id | Page 49 | Al-Imām ibn al-Qayyim [may Allāh have mercy on him]
Translation: Authentic Quotes