what is Advice?

What is an advice?

An advice is a kind of suggestion that anyone offers to other people in order to change his/her mind or   Behavior.
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i write some sentence about the advice .

investigate ,lest you harm out of ignorance.
Act justly.
Make peace between your brothers.
let not a people ridicule (another) people.
Do not insult one another.
Do not call each other by (offensive) nickname.
Avoid much (negative)assumption.
Do not spy on one another.
Do not backbite each other.