Surah 4 An Nisa Verses 57-58.
The believers are rewarded with pure spouses in paradise with eternal provision and shade.
Allah سُبْحَانَهُ وَتَعَالَى commands mankind to render back trusts that are due. Not doing so causes a grievous sin and punishment that will even nullify the reward of martyrdom.
"......Truly, Allah سُبْحَانَهُ وَتَعَالَى is Ever All - Hearer, All - Seer." (4:58)
