5 In a parable

"Then shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom. And five of them were wise, and five were foolish. ...While the bridegroom tarried, they all slumbered and slept. And at midnight there was a cry made, Behold, the bridegroom cometh; ...And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage:" Matthew 25:1-2,5-6c,10a-c (See verses 1-13).

It should be noted, however, that this is not a literal, physical marriage to literal, physical women. While it was only a parable, even so, Jesus would never have described Himself this way in a parable if polygamy was a sin.