Garudapurana 1.11.4

1.11.4

tato budvudamadhye tu pītavāsāścaturbhujaḥ /
ahaṃ matastathātmānaṃ dhyānena paricintayet //

Then, in the center of the bubble, wearing yellow garments, having four arms, / one should contemplate the self through meditation, thinking: “I am He.”