When to Use
- When you win an argument without saying a word.
- To react to someone explaining something obvious to you.
- To express patience when someone else is panicking.

Source: Mahabharat
Lord Krishna is shown with an expressive, gentle smile with his hand resting near his forehead, creating a calm and knowing facial expression.
This image is used as a reaction to express satisfaction, subtle mockery, patience, or a knowing sense of amusement at someone else's situation.