Is it lawful to the eyes of God to discipline a child with a rod?
Proverbs 23:13-16 King James Version (KJV)
13 Withhold not correction from the child: for if thou beatest him with the rod, he shall not die.
14 Thou shalt beat him with the rod, and shalt deliver his soul from hell.
Proverbs 13:24 King James Version (KJV)
24 He that spareth his rod hateth his son: but he that loveth him chasteneth him betimes.
Proverbs 22:15 King James Version (KJV)
15 Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.
Proverbs 3:11-12 King James Version (KJV)
11 My son, despise not the chastening of the Lord; neither be weary of his correction:
12 For whom the Lord loveth he correcteth; even as a father the son in whom he delighteth.
Exodus 20:12 King James Version (KJV) Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.
Regardless of the kind of parents you have, either how bad or good they are.
Matthew 5 King James Version (KJV)
43 Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.
44 But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
46 For if ye love them which love you, what reward have ye? do not even the publicans the same?
47 And if ye salute your brethren only, what do ye more than others? do not even the publicans so?
48 Be ye therefore perfect, even as your Father which is in heaven is perfect.
Source: King James Bible