Verse 21

चेतसा संपरित्यज्य सर्वभावात्मभावनाम् ।यथा तिष्ठसि तिष्ठ त्वं तथा शैले गृहेऽथवा

In plain words

Having given up, with the mind, the imagining of self in every state of being, remain just as you already are -- whether on a mountain or in a house.