Matthew 5:28

but I tell you, that whosoever looks on a woman with impure desires is already guilty of approving the fact.

James 1:14-15

a man is instigated, and drawn into the snare by his own vicious passions, which once indulg'd, are productive of sin,

Treasury of Scripture Knowledge

Summary

Lust not after her beauty in thine heart; neither let her take thee with her eyelids.

Bible References

Lust

Matthew 5:28
but I tell you, that whosoever looks on a woman with impure desires is already guilty of approving the fact.
James 1:14
a man is instigated, and drawn into the snare by his own vicious passions, which once indulg'd, are productive of sin,