Garudapurana 1.123.8

1.123.8

prathame 'hni hareḥ pādau yajetpadmairdvitayika /
bilvapatrairjānudeśaṃ nābhi gandhena cāpare //

On the first day, he should worship Hari’s feet with lotuses; on the second, / the region of the knees with bilva leaves; and on the other [day], the navel with fragrant paste;