Quran 2:153 — The Heifer (Al-Baqarah)

O you who believe, seek help through steadfastness and the Contact Prayers (Salat). GOD is with those who steadfastly persevere.

[2:152] You shall remember Me, that I may remember you, and be thankful to Me; do not be unappreciative.

[2:154] Do not say of those who are killed in the cause of GOD, "They are dead." They are alive at their Lord, but you do not perceive.