Brihat Parashara Hora Shastra
कुटुम्बस्थानगे शुक्रे दारेशे लाभराशिगे । दशमे षोडशाऽब्दे च विवाहः प्रायशो भवेत् ॥ २४॥
Śukr in Dhan, while Yuvati Lord is in Labh will give marriage at the age of 10, or 16.
english translation
kuTumbasthAnage zukre dAreze lAbharAzige । dazame SoDazA'bde ca vivAhaH prAyazo bhavet ॥ 24॥
hk transliteration by Sanscript