You won't be surprised that I disagree. :) Why don't you go back to Genesis and show me the gospel Abraham believed in? I'm pretty sure it is the gospel of the entire OT .. the "gospel of the kingdom" of the coming Messiah, Gen 3:15. Job knew it, Job 19:25-27.
skypair
The gospel preached to Abraham is the same gospel of Jesus Christ we have believed. That's what Paul taught:
Gal 3:7-9
7 Know ye therefore that they which are of faith, the same are the children of Abraham.
8 And the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed.
9 So then they which be of faith are blessed with faithful Abraham.
KJV
Gal 3:14
14 That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith.
KJV
The promise by faith God gave Abraham, and Abraham believed, meaning he had faith that what God promised that He would fulfill. Thus God counted Abraham's faith as righteousness. Within those promises God gave Abraham was the promise by faith of the Gospel of Jesus Christ unto Salvation, which Paul reveals in that Galatians 3:14 verse.
Even what you have quoted from Job shows the Gospel of Jesus Christ, and not just a gospel of the kingdom only, and that Jesus' coming to die on the cross was known of in Old Testament times. David was given to prophesy of Christ's crucifixion in Psalms 22. Zechariah was given to write of events of Christ's first coming:
Zech 12:10
10 And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.
KJV
Zech 13:6
6 And one shall say unto him, What are these wounds in thine hands? Then he shall answer, Those with which I was wounded in the house of my friends.
KJV
Ps 22:1
22:1 My God, my God, why hast thou forsaken me? why art thou so far from helping me, and from the words of my roaring?
KJV
Ps 22:14-18
14 I am poured out like water, and all my bones are out of joint: my heart is like wax; it is melted in the midst of my bowels.
15 My strength is dried up like a potsherd; and my tongue cleaveth to my jaws; and thou hast brought me into the dust of death.
16 For dogs have compassed me: the assembly of the wicked have inclosed me: they pierced my hands and my feet.
17 I may tell all my bones: they look and stare upon me.
18 They part my garments among them, and cast lots upon my vesture.
KJV
1st Coming:
Zech 9:9-10
9 Rejoice greatly, O daughter of Zion; shout, O daughter of Jerusalem: behold, thy King cometh unto thee: he is just, and having salvation; lowly, and riding upon an ass, and upon a colt the foal of an ass.
2nd Coming:
10 And I will cut off the chariot from Ephraim, and the horse from Jerusalem, and the battle bow shall be cut off: and he shall speak peace unto the heathen: and his dominion shall be from sea even to sea, and from river even to the ends of the earth.
KJV