BG Chap 11 - Arjuna's vision of the universal form

Arjuna could see all the demigods and the mass of all living beings situated in the body of the Lord. He saw Lord Brahmā seated on a lotus flower, and Īśa, who is Lord Śiva according to Śrīla Prabhupāda, and Lord Viṣṇu according to Baladeva Vidyābhūṣaṇa. Arjuna saw Garbhodakaśāyī Viṣṇu situated as antaryāmī within Brahmā. Viśvanātha Cakravarti Thakura says Brahmā was situated on Mount Meru at the center of the lotus of the earth planet. Arjuna also saw sages and great serpents like Vāsuki. Arjuna said he saw the Lord everywhere with infinite form, with many arms, bellies, mouths and eyes, but could see no beginning, middle or end of this form. He saw the forms of devas and other things in the body of Mahā-Viṣṇu. The form was difficult to behold because on all sides it was as brilliant as blazing fire and the sun. Arjuna saw the Lord with crown, club, and cakra like a mass of light shining everywhere.