What is the origin of the idiom "lend a hand" and when to use it?

The origin of the idiomatic expression "lend a hand" can be traced back to the literal act of physically assisting someone by extending a hand to offer support. It has likely emerged from the universal understanding of reaching out and offering help to those in need. Over time, this idiom have become deeply ingrained in language and culture, emphasizing the importance of being helpful, supportive, and compassionate towards others.