Luqman · 31:16

16. O my son! Indeed, evil and good, no matter how small, even if they equal to the weight of a mustard seed and are in the middle of a rock so no one is aware, or in any place in the heavens or earth, Allah will Indeed, bring them on the Day of Judgment and requite the servant for them. Allah is the most subtle, whose knowledge encompasses all secret and hidden matters. He is kind to His servants and aware of everything.