  Another interesting sequence of numbers is in the phrase my beloved Son. It is referenced nine (9) times in the New Testament; however, one was in a parable, and the other by Paul to Timothy. Here is the interesting point SEVEN (7) times my beloved Son is recorded in the New Testament. Of course, it HAD to be SEVEN, because SEVEN represents or symbolizes God’s perfection, God in His COMPLETE PERFECTION. Of course, it HAD to be SEVEN when speaking of His beloved Son because the Lord Jesus Christ was the perfect work of God on the cross of Calvary, He is the perfect Christ as the Creator, He is the perfect Christ in our rest. Christ is the perfection of the divine accomplishment of the Godhead bodily; therefore, Christ is the perfection in the number seven.
And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased. (Matthew 3:17)
While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him. (Matthew 17:5)
And there came a voice from heaven, [saying], Thou art my beloved Son, in whom I am well pleased. (Mark 1:11)
And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him. (Mark 9:7)
And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased. (Luke 3:22)
And there came a voice out of the cloud, saying, This is my beloved Son: hear him. (Luke 9:35)
For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased. (2nd Peter 1:17)
Taken from the article Balaam, Part xiii, The Third Parable, The Love of God from the series titled Men of Renown.