Gen 3:15, Gen 22:17-18,Gal 3:16, Gen 49:10, Jn 3:16
In the Old Testament, God foretold what God would do and said that He would accomplish it. (Isa 46:10)
Isa 46:10 Declaring the end from the beginning, and from ancient times the things that are not yet done, saying, My counsel shall stand, and I will do all my pleasure:
In the Old Testament, God foretold in advance that He would send Christ, the descendant of a woman, to this earth to crush Satan's head. (Genesis 3:15)
Genesis 3:15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
In the Old Testament, God foretold in advance that through the descendants of Abraham, the enemy would be defeated and all peoples under the world would be blessed. (Ge 22:17-18)
Ge 22:17 That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies; 18 And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice.
The descendant of Abraham, whom God spoke of in the Old Testament, is Christ. (Ga 3:16)
Ga 3:16 Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ.
In the Old Testament, God foretold that Christ would come as a descendant of Judah and that all people would obey Him. (Ge 49:10)
Ge 49:10 The sceptre shall not depart from Judah, nor a lawgiver from between his feet, until Shiloh come; and unto him shall the gathering of the people be.
As God said in the Old Testament, He loved us and sent Christ to this earth. (John 3:16)
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.