The following quotations come from the King James Version (KJV) of the Bible:
Prov 13:24: "He that spareth his rod hateth his son: but he that loveth him chasteneth him betimes (diligently)."
Prov 19:18: "Chasten thy son while there is hope, and let not thy soul spare for his crying."
Prov 22:15: "Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him."
Prov 23:13: "Withhold not correction from the child: for if thou beatest him with the rod, he shall not die."
Prov 23:14: "Thou shalt beat him with the rod, and shalt deliver his soul from hell (Shoel)."
Prov 29:15: "The rod and reproof give wisdom: but a child left to himself bringeth his mother to shame."
An additional verse from the New Testament is occasionally cited as justification for physical punishment of children:
Hebrews 12:6-7: "...the Lord disciplines those he loves, and he punishes everyone he accepts as a son. Endure hardship as discipline; God is treating you as sons. For what son is not disciplined by his father?"