Thiruvasagam, Tiruvacakam (Tamil: திருவாசகம் lit. "sacred utterance") is a volume of Tamil hymns composed by the ninth century Shaivite bhakti poet Manikkavacakar. It contains 51 compositions and constitutes the eighth volume of the Tirumurai, the sacred anthology of Tamil Shaiva Siddhanta.

Manikkavasagar, though he is not counted as one of the 63 Saiva nayanars, he is counted as Nalvars consisting of the first three nayanars namely Appar, Sambandhar and sundharar.