Charak Samhita
भवतश्चात्र- स्रोतःसु शुद्धेष्वमले शरीरे वृष्यं यदा ना मितमत्ति काले। वृषायते तेन परं मनुष्यस्तद्बृंहणं चैव बलप्रदं च ॥५०॥
Here are the two verses- A person, who takes these virilifying preparations in due dose and at a proper time, when his body channels have been cleaned, attains the virility, nourishment and strength.
english translation
bhavatazcAtra- srotaHsu zuddheSvamale zarIre vRSyaM yadA nA mitamatti kAle। vRSAyate tena paraM manuSyastadbRMhaNaM caiva balapradaM ca ॥50॥
hk transliteration by Sanscript