Markandeyapurana 39.28

39.28

padmamardhāsanañcāpi tathā svastikamāsanam /
āsthāya yogaṃ yuñjīta kṛtvā ca praṇavaṃ hṛdi //

Adopting the padma half seat, and the svastika sitting posture, he should utter the syllable Om! in his heart and practise his religious devotion. Sitting evenly on an even seat, drawing in both his feet, and firmly fixing his thighs rightly in front, he should cover his mouth; he should sit without touching his private parts with his heels, with his senses under control; he should raise his head slightly; he should not close his teeth together. Gazing at the tip of his own nose and not looking around, the religious devotee should conceal the activity of darkness with passion, and that of passion with goodness, and taking his stand in unsullied goodness should practise devotion. He should hold in his organs of sense from their objects of sense, and his breath and other faculties and his mind, he should advance to abstraction with a steadfast cohesion. But he who should draw in his desires, as a tortoise draws in all its limbs, always delighting in soul and self-collected, sees soul in soul. The wise man after purifying himself externally and internally, and filling out his body from the navel to the neck, should advance to abstraction. A ‘dhāraṇā,’ or steady mental abstraction, is called twelve prāṇāyāmas. Two kinds of dhāraṇā are known in religious devotion by devotees who are conversant with the truth. Moreover when a religious devotee is steeped in devotion and controls his soul, all his faults perish, and he becomes whole; and he sees supreme Brahma and the qualitieś of Nature separately, the sky and the primordial atoms and the unsullied soul.