God’s people today, Christians, who are under the New Covenant, are not required to be circumcised.. 

“Neither circumcision nor uncircumcision means; what counts is the new creation”—Galatians 6:15 NIV

“Circumcision is nothing and uncircumcision is nothing. Keeping God’s commands is what counts”—1 Corinthians 7:19 NIV

Today, it is fine if a male is circumcised, and it is also fine if they’re not circumcised. What is important is a person’s relationship with God through Christ.

However, under God’s covenant with Abraham, and later under his Covenant with the nation of Israel, circumcision was required.

“For the generations to come every male among you who is with days old must be circumcised”—Genesis 17:12 NIV

Jesus, on earth, was born to Jewish parents who were under God’s Covenant with the nation of Israel. 

“On the eighth day they came to circumcise the child, and they were going to name him after his father Zechariah”—Luke 1:59 NIV

“On the eighth day, when it was time to circumcise the child, the was named Jesus, the name the angel had given him before he was conceived”—Luke 2:21 NIV

It is obvious that Jesus was circumcised on the eight day of his earthly life.

Why did God require circumcision for males to be done on the eight day? Until the 1930’s, all that was known was that this is what God had commanded during that time, for his people under those covenants.

However, in the 1930’s, two research scientists discovered several things that are relevant to this subject. The vital clotting element, vitamin K, is not even present in the body until the 5th to the 7th days, so, today, those circumcised prior to this are infused with Vitamin K. Interestingly, they discovered that Vitamin K is at the highest level a person will ever have in their entire life on the eighth day. They also discovered that the levels of another important clotting element, Prothrombin, reach their highest levels in a person’s life on the eighth day. The researchers were awarded the Nobel Prize inn recognition of their work.

These scientific discoveries confirm the wisdom of Almighty God, and are just some of the many thousands of pieces of evidence that are available for people to check which confirm the authenticity of the Bible.

It has also been discovered that there are actually health benefits to circumcision. According to Mayo Clinic, these include:

Easier hygiene 

Decreased risk of urinary tract infections

Decreased risk of urinary tract infections

Decreased risk of penile cancer

Prevention of penile problems

There would have been no way that people in ancient times could have been aware of all these health benefits of circumcision.

“Oh, the depth of the riches of wisdom and knowledge of God! How unsearchable his judgments, and his paths beyond tracing out!”—Romans 11:33 NIV

“All people are like grass, and all their glory is like the flowers of the field; the grass withers and the flowers fall, but the word of the Lord endures forever”—1 Peter 1:24,25 NIV

In stark contrast to merely human works, the more time goes by, and the more discoveries that are made, the more evidence mounts confirming the truth and accuracy of the Bible!