His left leg was placed on his right thigh, and his left hand was placed on his left thigh. [This sitting posture is called vīrāsana.] In his right hand he held rudrākṣa beads, and his finger was in the mode of argument.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कृत्वोरौ दक्षिणे सव्यं पादपद्मं च जानुनि । बाहुं प्रकोष्ठेऽक्षमालामासीनं तर्कमुद्रया
kṛtvorau dakṣiṇe savyaṃ pādapadmaṃ ca jānuni | bāhuṃ prakoṣṭhe'kṣamālāmāsīnaṃ tarkamudrayā
SB 4.6.38