Original Verse:
Romans Chapter 11 Verse 22Behold then the goodness and severity of God: toward them that fell, severity; but toward thee, God`s goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.

Reference Verses:
1st Corinthians Chapter 15 Verse 2by which also ye are saved, if ye hold fast the word which I preached unto you, except ye believed in vain.
Hebrews Chapter 3 Verse 6but Christ as a son, over his house; whose house are we, if we hold fast our boldness and the glorying of our hope firm unto the end.
Hebrews Chapter 3 Verse 14for we are become partakers of Christ, if we hold fast the beginning of our confidence firm unto the end: