Sirach 9:9
V 9 Do not sit at all with another man's wife, Nor sit down with her in your arms, And do not spend your silver with her on wine; Lest your heart incline toward her, And so, through your desire to fall into destruction.

Duetoronomy
5,21‘You do not covet your neighbour’s wife, nor do you desire your neighbour’s house, his field, nor his male servant, nor his female servant, his ox, nor his donkey, or whatever belongs to your neighbour.

Prov 6
27Would a man take fire to his bosom, And his garments not be burned?
28Would a man walk on hot coals, And his feet not be scorched?
29So is he who goes in to his neighbour’s wife; None who touches her goes unpunished

Leviticus 20
10‘And a man who commits adultery with the wife of another man, who commits adultery with the wife of his neighbour: the adulterer and the adulteress shall certainly be put to death.