What is the origin of the idiom "gentle as a lamb" and when to use it?

The idiom "gentle as a lamb" has its origin in biblical and literary references. In the Bible, lambs are often associated with innocence and meekness, portraying a gentle and harmless nature. This expression is used to describe someone's kind and calm nature. It can be used in various contexts, such as describing a person's personality, behavior, or temperament. The phrase highlights their gentle and peaceful character in everyday conversations or when discussing their non-aggressive approach to interactions.