Beware of polytheism and sins, including "the seven most grievous sins". They are: associating others with Allah the Almighty in worship, sorcery, killing someone except for a just cause (as defined by Islamic law), eating up the orphan's property, dealing with usury and living on its income, refusing to join the Muslim army after its advancement with the Muslim leader, and slandering chaste, virtuous and believing women.

Also, disobedience to the parents, severing the bonds of blood relationship, giving false testimony, perjury, harming the neighbors, and wronging people and being unjust to them in matters of blood, property and honor are among the awful sins that must be avoided.