Luke 1:76-78 (ESV)

And you, child, will be called the prophet of the Most High;
for you will go before the Lord to prepare his ways,
to give knowledge of salvation to his people
in the forgiveness of their sins,
because of the tender mercy of our God

St. John the Baptist as a Child, c.1665
Bartolomé Esteban Murillo (Spanish, 1617-1682)