Warning is the action and effect of warning (calling attention to something, advising, preventing). When someone tries to give a warning to another person, he intends to warn him about something in particular. For example: "It's not a threat, it's a warning: if you hurt my daughter, you'll deal with me", "Luckily I was able to listen to my friends' warning and I didn't accept their proposal", "If you want to work in this company for many years, you should heed my warnings”.
Now, this warning can be transmitted orally, in a conversation with someone, or failing that, it is also recurrent to find written warnings in which the public is warned or warned about a situation. In the bible there are many warnings for its believers and this can be seen reflected in Compared Bible