Garudapurana 2.4.142

2.4.142

pāradaṃ retasaḥ sthāne purīṣe pittalaṃ tathā /
manaḥ śilā tathā gātre tilapakvantu sandhiṣu //

Mercury in place of the semen, brass in place of the feces,
Realgar on the body, and cooked sesamum at the joints;