Verse 44

पृष्टशून्यं मूलशून्यं युगपद् भावयेच् च यः ।शरीरनिरपेक्षिण्या शक्त्या शून्यमना भवेत्

In plain words

Whoever contemplates the void behind and the void at the root all at once, through a that has no regard for the body, becomes void in .