Jayarātha
Jayarātha was a warrior who fought in the Kurukshetra war. Bhīmasena killed him in the Droṇa Parva of the Mahābhārata.
His death
The Droṇa Parva names Jayarātha among the warriors that Bhīma killed in the long battles of that part of the war. This is told in Chapter 155.
Not Jayadratha
Jayarātha is a different person from Jayadratha, the king of the Sindhu country (the Saindhava king), whom Arjuna killed.
Sources
- Mahābhārata, Droṇa Parva, Chapter 155