And again I say to you, it is easier for a camel to go through the eye of a needle than for a rich man to enter the kingdom of God. Matthew19:24
The “Eye of a Needle” was a narrow gateway into Jerusalem. Since camels were heavily loaded with goods and riders, they would need to be un-loaded in order to pass through. Therefore, the analogy is that a rich man would have to similarly unload his material possessions in order to enter heaven.