SB 2.10.15

antaḥ śarīra ākāśāt
 puruṣasya viceṣṭataḥ
ojaḥ saho balaṁ jajñe
 tataḥ prāṇo mahān asuḥ
Synonyms: 
antaḥ śarīre — within the body; ākāśāt — from the sky; puruṣasya — of Mahā-Viṣṇu; viceṣṭataḥ — while so trying, or willing; ojaḥ — the energy of the senses; sahaḥ — mental force; balam — bodily strength; jajñe — generated; tataḥ — thereafter; prāṇaḥ — the living force; mahān asuḥ — the fountainhead of everyone’s life.
Translation: 
From the sky situated within the transcendental body of the manifesting Mahā-Viṣṇu, sense energy, mental force and bodily strength are all generated, as well as the sum total of the fountainhead of the total living force.