You do not have his word abiding in you because you do not believe the one whom he sent. John 5:38, translated from the NA28 Greek text
καὶ τὸν λόγον αὐτοῦ οὐκ ἔχετε ἐν ὑμῖν μένοντα, ὅτι ὃν ἀπέστειλεν ἐκεῖνος, τούτῳ ὑμεῖς οὐ πιστεύετε. John 5:38 NA28
In John 5:30–47, the apostle gives us several witnesses to establish the truthfulness and genuiness of Jesus Christ and His ministry. Our Lord Jesus presented to those who opposed Him these witnesses who testified to His identity as the Son. The first witness given is John the Baptist in vv. 32–35. The second witness is our Lord’s own words in vv. 35, 36. The third witness is the Father in vv. 37, 38. The fourth witness is the Old Testament scripture in vv. 39-47. However, as is the case from this point to the end of John, those who most vehemently opposed our Lord and His ministry refused to believe.