Al-Isra' - ১৭:১৯

وَمَنْ أَرَادَ الآخِرَةَ وَسَعَى لَهَا سَعْيَهَا وَهُوَ مُؤْمِنٌ فَأُولَئِكَ كَانَ سَعْيُهُم مَّشْكُورًا
[17:19]
And whoever desires the hereafter and strives for it as he ought to strive and he is a believer; (as for) these, their striving shall surely be accepted.
Those who do wish for the (things of) the Hereafter, and strive therefor with all due striving, and have Faith,- they are the ones whose striving is acceptable (to Allah).
And whoso desireth the Hereafter and striveth for it with the effort necessary, being a believer; for such, their effort findeth favour (with their Lord).