Lyrics and origin of the Virutam Oru mugam salithal

[asangeetha]

I heard this virutam sung by MLV starting with the words oru mugam salithal. Can someone help me with the lyrics and origin of this verse? Thanks

[Pratyaksham Bala]

oru mugam shalittAl

oru mugam shalittAl maruvu SaNmugattil
maRu mugam iranguvatu illaiyO - murugA

oru shevi maRuttAl panniru shevikaLil
oru shevi kETpadumillaiyO - murugA

oru karam aDittAl murugA un panniru karattuL
oru karam aNaippadumillaiyO - murugA

oru mozhi shivanukku uraitta meignAna murugA
nI maRumozhi pEshuvadum illaiyO

Om murugAvena nAn OlamiTTazhaikka
ODi vandu aruL purindavanE

OhO idu enna pArvaiyO murugA idu enna pArvaiyO
un mugam enaippArkka maRuttAl maRu mugam uLadO ?

tiruttaNi maNi viLakkE !

[asangeetha]

Thank you so much. It’s beautiful. May I know the composer?