CC Ādi 14.87

putrera lālana-śikṣā — pitāra sva-dharma
āmi nā śikhāle kaiche janibe dharma-marma
Word for word: 
putrera — of the son; lālana — maintenance; śikṣā — education; pitara — of the father; sva-dharma — duty; āmi — if I; — do not; śikhāle — give education; kaiche — how; janibe — He will know; dharma-marma — religion and morality.
Translation: 
“It is the duty of a father to educate his son in both religion and morality. If I do not give Him this education, how will He know of it?”