1. 45

    पृष्टशून्यं मूलशून्यं हृच्छून्यं भावयेत्स्थिरम् । युगपन्निर्विकल्पत्वान्निर्विकल्पोदयस्ततः ॥ ४५ ॥

    By steady contemplation on the void of the back (sushumna), the void of the root and the void of the heart simultaneously, there arises the state of nirvikalpa, which is free from thought constructs.