- Jesus was led into the wilderness to fast and pray for 40 days - Matthew 4
- Jonah began to call Nineveh to repent for 40 days which they did with fasting - Jonah 3
- Moses went up the mountain, spent time with God, got the covenant and he fasted 40 days - Exodus 34
It's pretty clear God is calling us to repent, fast and pray. What do you think? I think Joel 2 says it best.
“Now, therefore,” says the Lord,
“Turn to Me with all your heart,
With fasting, with weeping, and with mourning.”
So rend your heart, and not your garments;
Return to the Lord your God,
For He is gracious and merciful,
Slow to anger, and of great kindness;
And He relents from doing harm.
Who knows if He will turn and relent,
And leave a blessing behind Him--
A grain offering and a drink offering
For the Lord your God?
Blow the trumpet in Zion,
Consecrate a fast,
Call a sacred assembly;
Gather the people,
Sanctify the congregation,
Assemble the elders,
Gather the children and nursing babes;
Let the bridegroom go out from his chamber,
And the bride from her dressing room.
Let the priests, who minister to the Lord,
Weep between the porch and the altar;
Let them say, “Spare Your people, O Lord,
And do not give Your heritage to reproach,
That the nations should rule over them.
Why should they say among the peoples,
‘Where is their God?’ ”