Deuteronomy 4:30 When you are in distress and all these things have come upon you, in the latter days, you will return to the LORD your God and listen to His voice. Traditional Jewish commentaries recognize the distress in this verse as this same seven year tribulation period.
This passage from Daniel Chapter 9:24-27 also sheds some light on this period.
24 Seventy 'sevens' are decreed for your people and your holy city to finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the most holy.
25 Know and understand this: From the issuing of the decree to restore and rebuild Jerusalem until the Anointed One, the ruler, comes, there will be seven 'sevens,' and sixty-two 'sevens.' It will be rebuilt with streets and a trench, but in times of trouble.
26 After the sixty-two 'sevens,' the Anointed One will be cut off and will have nothing. The people of the ruler who will come will destroy the city and the sanctuary. The end will come like a flood: War will continue until the end, and desolations have been decreed.
27 He will confirm a covenant with many for one 'seven.' In the middle of the 'seven' he will put an end to sacrifice and offering. And on a wing of the temple he will set up an abomination that causes desolation, until the end that is decreed is poured out on him.
Also found in the book of Daniel is this passage sometimes referred to as "The Time Of Jacob's Trouble".
Daniel 12:1 "Now at that time Michael, the great prince who stands guard over the sons of your people, will arise. And there will be a time of distress such as never occurred since there was a nation until that time; and at that time your people, everyone who is found written in the book, will be rescued.
Jeremiah 23:20 also talks about this time.
Jeremiah 23:20 "The anger of the LORD will not turn back Until He has performed and carried out the purposes of His heart; In the last days you will clearly understand it.
Other JewishRoot.Net pages related to the tribulation include:
Some tribulations are described in the Talmud book of Sanhedrin 97b.