It is through the remembrance of Allah that hearts find rest, these verses recall, and serenity born of faith is a criterion of judgement, whereas feeling secure in the life of this world is heedlessness. They also mention Abraham asking to see how Allah gives life to the dead, so that his heart might be reassured.
Verses gathered from a topical index of the Quran, in Mushaf order; every verse is quoted in full.
Whoever disbelieves in [i.e., denies] Allāh after his belief... except for one who is forced [to renounce his religion] while his heart is secure in faith. But those who [willingly] open their breasts to disbelief, upon them is wrath from Allāh, and for them is a great punishment;