You participate in the Tournament of power. If you fall from the ring, it could be the end of your universe. You saw a person distracted meditating, so you tried to take advantage of it, but as soon as you get closer, a warm menacing aura surrounds you. The meditator stands up and looks at you with a cold look and then looks away

Jiren: It's not worth wasting my power on you

He goes back to meditating