1 Corinthians 15:3-4, 13-14

For I passed on to you as of first importance what I also received, that Christ died for our sins according to [that which] the Scriptures [foretold], [Is 53:5-12] and that He was buried, and that He was [bodily] raised on the third day according to [that which] the Scriptures [foretold], [Ps 16:9, 10]

But if there is no resurrection of the dead, then not even Christ has been raised; and if Christ has not been raised, then our preaching is vain [useless, amounting to nothing], and your faith is also vain [imaginary, unfounded, devoid of value and benefit—not based on truth].