تفسير : lo! your effort) your work (is dispersed (towards diverse ends)) there are those who oppose and disbelieve in muhammad (pbuh) and the qur'an and there are those who believe in muhammad (pbuh); there are those who strive for paradise and there are those who strive for hell. this is why allah made the oath.
Jalāl al-Dīn al-Maḥallī
تفسير : assuredly your efforts, your deeds, are dissimilar, with some working towards paradise by means of obedience, while others [in effect] are working towards the fire through [acts of] disobedience.
Sahl al-Tustari
تفسير : assuredly your efforts are dissimilar.there are some that are pure and some that are tainted with impurities (aḥdāth).