“God the Almighty has established the angels as guards for plants on the Earth such as fruit trees and palm trees. There are no fruit trees or palm trees for which there is no appointed guardian angel when it is about to bear fruit. If there were no guardian angels with them to protect them, then the insects and the wild animals would destroy the tree. That is why the Prophet of God (a.s) has ordered his followers not to build a toilet under fruit or palm trees, since their appointed guarding angels reside there. He also said that the fruit or palm trees that have produced fruits are respectable like the people, because the angels are present there.”