What is the origin of the idiom "lend someone one's ear" and when to use it?

The idiom "lend someone one's ear" has its roots in ancient times and is often associated with the works of William Shakespeare. One of the most famous uses of this phrase can be found in Shakespeare's play "Julius Caesar," where Mark Antony says, "Friends, Romans, countrymen, lend me your ears." It is used to convey the idea of listening attentively and with care to what someone is saying. It signifies a willingness to hear someone out and offer them your full and undivided attention.