yogam ātma-viśuddhaye

sucau-in sanctified; dese-in the land; pratisthapya-placing; sthiram-firm; asanam-seat; atmanah-self-dependant; na-not; ati-too; ucchritam-high; na-nor; ati-too; nicam-low; caila-ajna-soft cloth and deerskin; kusottaram-kusa grass; tatra-thereupon; ekagram-one attention; manah-mind; krtva-doing so; yata-citta-controlling the mind; indriya-senses; kriyah-activities; upavisya-sitting on; asane-on the seat; yunjyat-execute; yogam-yoga practice; atma-heart; visuddhaye-for clarifying.