Musar su Salmi 29:1

There is a general concensus among our sages that the Torah was given to the Jewish people on the Sabbath. Torah originated in Heaven, (i.e. the domain of תפארת,) the domain in which the concept of Israel is at home. This domain radiates spiritual values in all six directions. Moses told the Israelites in Deut. 4,36: מן השמים השמיעך את קולו ליסרך, ועל הארץ הראך את אשו הגדולה, ודבריו שמעת מתוך האש. "G–d made you hear His voice from Heaven in order to discipline you, and on the earth He showed you His great fire, and you heard His words out of the fire." The "earth" referred to here is the emanation מלכות. G–d told us that the emanations from תפארת up to and including the emanation מלכות, i.e. 7 emanations, were part of the revelation at Mount Sinai. These are the seven קולות, voices, that David refers to in Psalm 29 which we recite every Friday evening when ushering in the Sabbath. They are also an allusion to the tradition that this universe will continue for 6,000 years before it will experience a metamorphosis of 1,000 years after which the עולם הבא will be ushered in. The 1,000-year interval symbolises the concept of the Sabbath. We have discussed the dimension of "Time" on pages 208-209. When calculating the number of Sabbath days in the 6,000 years and adding the fact that the 1,000-year interval before the advent of עולם הבא is composed only of Sabbath days we get a total of 600,000 Sabbath days, or the same number as the number of the Jewish souls which experienced the Revelation and the building of the Tabernacle. This number also equals the number of letters the Torah is made up of.