Genesis 13:13

But the men of Sodom were wicked and sinners before the Lord exceedingly. This remark, which ascribes to the inhabitants of Sodom a wickedness in unusual measure, even in the midst of heathendom, not only prepares for the later story of the city's fate, Genesis 19, but it also throws some light upon the character of Lot, who chose this city for his home. He may have been one with Abraham in faith till now, but apparently avarice had taken hold of his heart, causing him to disregard the great moral dangers of a notoriously wicked city for his children, only for the sake of greater gain. From this time forth the worldly thoughts and inclinations strove in his heart with his faith and reverence for the true God.