Bhagavad Gita Chapter 10.8
ahaḿ sarvasya prabhavo
mattaḥ sarvaḿ pravartate
iti matvā bhajante māḿ
budhā bhāva-samanvitāḥ
Translation
I am the source of all spiritual and material worlds. Everything emanates from Me. The wise who perfectly know this engage in My devotional service and worship Me with all their hearts.