Garudapurana 1.16.4

1.16.4

sarvabhūtahṛdisthaṃ vai sarvabhūtamaheśvaram /
sarvādhāraṃ nirādhāraṃ sarvakāraṇakāraṇam //

dwelling in the heart of all beings, the Great Lord of all beings,
the support of all, devoid of support, the cause of all causes;