Jesus said, “It’s easier for a camel to go through the eye of a needle than for a rich person to enter the kingdom of God” (Mt 19:24; Mk 10:25; Lk 18:25). Jesus said this after the young rich ruler refused Jesus’ call to discipleship because he was unwilling to give away all of his riches. Jesus’ point seems to be that people with wealth tend to trust in their wealth, making it difficult for them to place their trust in Christ.
This doesn’t make much sense on a Calvinistic view of salvation, and thus serves as evidence against Calvinism.