Leviticus 18:19
"You must not go near a woman to have sexual relations with her during her monthly period, when she is unclean."

The time of "uncleanness" is one week:
Leviticus 15:19-24
“When a woman has her monthly period, she is unclean for seven days; anyone who touches her will be unclean until evening.  Anything she lies on during this time will be unclean, and everything she sits on during this time will be unclean.  Anyone who touches her bed must wash his clothes and bathe in water; that person will be unclean until evening.  Anyone who touches something she has sat on must wash his clothes and bathe in water; that person will be unclean until evening.  It does not matter if the person touched the woman’s bed or something she sat on; he will be unclean until evening.  If a man has sexual relations with a woman and her monthly period touches him, he will be unclean for seven days; every bed he lies on will be unclean."



Matthew 4:1-11
    Then the Spirit led Jesus into the desert to be tempted by the devil.  Jesus ate nothing for forty days and nights. After this, he was very hungry.  The devil came to Jesus to tempt him, saying, “If you are the Son of God, tell these rocks to become bread.”
    Jesus answered, “It is written in the Scriptures, ‘A person does not live by eating only bread, but by everything God says.’ ”
    Then the devil led Jesus to the holy city of Jerusalem and put him on a high place of the Temple.   The devil said, “If you are the Son of God, jump down, because it is written in the Scriptures:
        ‘He has put his angels in charge of you.
        They will catch you in their hands
so that you will not hit your foot on a rock.’ ”
    Jesus answered him,“It also says in the Scriptures, ‘Do not test the Lord your God.’ ”
    Then the devil led Jesus to the top of a very high mountain and showed him all the kingdoms of the world and all their splendor.   The devil said, “If you will bow down and worship me, I will give you all these things.”
    Jesus said to the devil, “Go away from me, Satan! It is written in the Scriptures, ‘You must worship the Lord your God and serve only him.’ ”
    So the devil left Jesus, and angels came and took care of him.


 
 






Psalm 51
(New Century Version)

"A psalm of David when the prophet Nathan came to David after David’s sin with Bathsheba."

God, be merciful to me
    because you are loving.
Because you are always ready to be merciful,
    wipe out all my wrongs.
Wash away all my guilt
    and make me clean again.
I know about my wrongs,
    and I can’t forget my sin.
You are the only one I have sinned against;
    I have done what you say is wrong.
You are right when you speak
    and fair when you judge.
I was brought into this world in sin.
    In sin my mother gave birth to me.
You want me to be completely truthful,
    so teach me wisdom.
Take away my sin, and I will be clean.
    Wash me, and I will be whiter than snow.
Make me hear sounds of joy and gladness;
    let the bones you crushed be happy again.
Turn your face from my sins
    and wipe out all my guilt.
Create in me a pure heart, God,
    and make my spirit right again.
Do not send me away from you
    or take your Holy Spirit away from me.
Give me back the joy of your salvation.
    Keep me strong by giving me a willing spirit.
Then I will teach your ways to those who do wrong,
    and sinners will turn back to you.
God, save me from the guilt of murder,
    God of my salvation,
    and I will sing about your goodness.
Lord, let me speak
    so I may praise you.
You are not pleased by sacrifices, or I would give them.
    You don’t want burnt offerings.
The sacrifice God wants is a broken spirit.
    God, you will not reject a heart that is broken and sorry for sin.
Do whatever good you wish for Jerusalem.
    Rebuild the walls of Jerusalem.
Then you will be pleased with right sacrifices and whole burnt offerings,
    and bulls will be offered on your altar.