Mahamrityunjaya mantra is a special chant that people say when they want to pray for healing and protection from sickness and death. It's like a magic spell to protect you from bad things happening to your body and help you stay healthy.
The chant goes like this: Om tryambakam yajamahe sugandhim pustivardhanam urvarukamiva bandhanan mrityor mukshiya maamritat. It's a little bit hard to say, but you can practice it!
The words in the chant are very powerful, and they ask a god named Shiva to help keep you healthy and alive. This god is known as the destroyer, but not in a bad way - he destroys bad things like sickness and death so that good things (like health and happiness) can take their place.
Many people believe that saying this chant can help them feel better when they're sick or worried about getting sick. It's like asking for some extra help from the universe to keep your body and mind healthy.
So if you ever feel like you need some extra protection from sickness and death, you can try saying the mahamrityunjaya mantra to feel better and get some extra help from the universe.