What is the origin of the idiom "at one's mother's knee" and when to use it?

The phrase "at one's mother's knee" likely originated from the practice of young children sitting or kneeling by their mother's side as she provided care, comfort, and guidance. "At mother's knee" is often used to refer to the early childhood years when a child is under the care and guidance of their mother or maternal figure. It can be used to describe a period of early learning, nurturing, and development, or to refer to the influence and teachings received from one's mother or maternal figure. It can also be used in a metaphorical sense to describe a strong and lasting bond between a child and their mother, or to evoke nostalgic or sentimental feelings associated with a mother's care and guidance.