en_tn_lite_do_not_use/mat/05/28.md

But I say to you

See how you translated this in Matthew 5:22.

everyone who looks on a woman to lust after her has already committed adultery with her in his heart

This teaches that a man who lusts after a woman is as guilty of adultery as a man who actually commits the act of adultery.

to lust after her

"and lusts after her" or "and desires to sleep with her"

in his heart

Here "heart" is used to refer to a person's thoughts. Alternate translation: "in his mind" or "in his thoughts"