about a Bible phrase

In the first place, it makes me feel heavy. Property does have this effect. Property produces men of weight, and it was a man of weight who failed to get into the Kingdom of Heaven. He was not wicked, that unfortunate millionaire in the Bible story, he was only stout; he stuck out in front, not to mention behind, and as he wedged himself this way and that in Heaven's entrance and brusied his well-fed flanks, he saw beneath him a comparatively slim camel passing through the eye of a needle and being woven into the robe of God. The Bible all though couples stoutness and slowness.

Please explain the last bolded sentence for us
Many thanks