अथ सिद्धासनम् योनिस्थानकं अङ्घ्रिमूलघटितं कृत्वा दृढं विन्यसेत् मेण्ढ्रे पादं अथैकं एव हृदये कृत्वा हनुं सुस्थिरम् । स्थाणुः संयमितेन्द्रियोऽचलदृशा पश्येद्भ्रुवोरन्तरं ह्येतन्मोक्षकपाटभेदजनकं सिद्धासनं प्रोच्यते ॥ १.३७ ॥

atha siddhāsanam yonisthānakaṃ aṅghrimūlaghaṭitaṃ kṛtvā dṛḍhaṃ vinyaset meṇḍhre pādaṃ athaikaṃ eva hṛdaye kṛtvā hanuṃ susthiram । sthāṇuḥ saṃyamitendriyo'caladṛśā paśyedbhruvorantaraṃ hyetanmokṣakapāṭabhedajanakaṃ siddhāsanaṃ procyate ॥ 1.37 ॥

When seated, firmly press the heel of the left foot against the perineum (the anal aperture and the right heel above and against the sex organ [the heels are stacked]. Press your chin into the manubrium of the chest bone (at the level of the heart) and sit calmly, with relaxed senses, while constantly gazing at the space between your eyebrows. This is called Siddhásana, the opening of the door of salvation.