Sutra:
206. lyappAlE "SnAtvA pu~njIta" ennumApOlE upAyAntharangaLai vittE paRRa vENumengiRadhu.

Sri PBA Swami's Sarartha Deepikai:
Just like the condition that one has to bathe before eating, the siddhopAyam can be followed only after giving up the other means. This is what is being said by the "ya" in the "tyajya".