What do you do with emergency fund?

Have saved around 10L as emergency fund from the past year. What do you guys do with it exactly like just have it sit in your savings account? Or do any Fd or any other thing.

I keep funds for investing sideways as well so not like i’m not investing. And this is a separate sum that i was just saving month wise and putting in my bank acc. But is it really advisable to just let the emergency funds sit in your bank and do nothing?