Rasamanjari 9.5

9.5

caṭakāṇḍaṃ tu saṃgrāhya navanītena peṣayet /
tena pralepayet pādau śukrastambhaḥ prajāyate /
yāvanna spṛśate bhūmiṃ tāvadvīryaṃ na muñcati //

Having taken a sparrow's egg, one should grind it with butter; / one should smear the feet with it: retention of semen occurs; / as long as he does not touch the ground, so long does he not release semen.