Charak Samhita
यथा मुकुलपुष्पस्य सु(ख) गन्धो नोपलभ्यते। लभ्यते तद्विकाशात्तु तथा शुक्रं हि देहिनाम् ॥३९॥
An unblossomed bud does not possess fragrance but fragrance appears when it blossoms. Similar phenomenon takes place in case of semen of the living beings.
english translation
yathA mukulapuSpasya su(kha) gandho nopalabhyate। labhyate tadvikAzAttu tathA zukraM hi dehinAm ॥39॥
hk transliteration by Sanscript