Surat Al-'Isrā' - سورة الإسراء

وَمَنْ أَرَادَ الْآخِرَةَ وَسَعَىٰ لَهَا سَعْيَهَا وَهُوَ مُؤْمِنٌ فَأُولَٰئِكَ كَانَ سَعْيُهُم مَّشْكُورًا

Muhsin Khan: And whoever desires the Hereafter and strives for it, with the necessary effort due for it (i.e. do righteous deeds of Allah's Obedience) while he is a believer (in the Oneness of Allah Islamic Monotheism), then such are the ones whose striving shall be appreciated, thanked and rewarded (by Allah).