When he (Vasudeva) understood that this was not an ordinary child but the Supreme Personality of Godhead, he became fearless. Regarding his son as the Supreme Lord, wonderful in everything, he began offering prayers appropriate for the Supreme Lord

Expressions researched:
"when he understood that this was not an ordinary child but the Supreme Personality of Godhead, he became fearless. Regarding his son as the Supreme Lord, wonderful in everything, he began offering prayers appropriate for the Supreme Lord"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

Within Vasudeva's heart, affection for his son and knowledge of the Supreme Lord's transcendental nature both awakened In the beginning Vasudeva thought, "Such a beautiful child has been born, but now Kaṁsa will come and kill Him." But when he understood that this was not an ordinary child but the Supreme Personality of Godhead, he became fearless. Regarding his son as the Supreme Lord, wonderful in everything, he began offering prayers appropriate for the Supreme Lord. Completely free from fear of Kaṁsa's atrocities, he accepted the child simultaneously as an object of affection and as an object of worship by prayers.

SB 10.3.13, Translation and Purport

Vasudeva said: My Lord, You are the Supreme Person, beyond material existence, and You are the Supersoul. Your form can be perceived by transcendental knowledge, by which You can be understood as the Supreme Personality of Godhead. I now understand Your position perfectly.

Within Vasudeva's heart, affection for his son and knowledge of the Supreme Lord's transcendental nature both awakened In the beginning Vasudeva thought, "Such a beautiful child has been born, but now Kaṁsa will come and kill Him." But when he understood that this was not an ordinary child but the Supreme Personality of Godhead, he became fearless. Regarding his son as the Supreme Lord, wonderful in everything, he began offering prayers appropriate for the Supreme Lord. Completely free from fear of Kaṁsa's atrocities, he accepted the child simultaneously as an object of affection and as an object of worship by prayers.