Surah 23. Al-Muminun, Ayah 8

Trusts may be express or implied. Express trusts are those where property is entrusted or duties are assigned by some one to some other whom he trusts, to carry out either immediately or in specified contingencies, such as death. Implied trusts arise out of power, or position, or opportunity; e.g., a king holds his kingdom on trust from Allah for his subjects. The subject of covenants, express and implied, has been discussed in n. 682 to v.1. Covenants create obligations, and express and implied trusts and covenants taken together cover the whole field of obligations.