Verse Ex24-12b discussing how God requested Moses come up to him states And HaShem said unto Moses: 'Come up to Me into the mount and be there; and I will give thee the tables of stone, and the law and the commandment, which I have written, that thou mayest teach them.' The underlined words Come up to Me into the mount echo a reference to the verse where it shows that Moses went up on the mountain for 40 days to receive the Torah. Dt09-09:11 states When I was gone up into the mount to receive the tables of stone, even the tables of the covenant which HaShem made with you, then I abode in the mount forty days and forty nights; ... And it came to pass at the end of forty days and forty nights, that HaShem gave me the two tables of stone, even the tables of the covenant. Hence we see that Moses ascended the mountain to be with God 40 days and 40 nights to receive the Torah.

Sermonic points: Throughout the Bible 40 is symbolic of embryonic birth since the foetus takes 40 days to begin differentiation. Hence the reference in Deuteronomy paints the receipt of the Torah law as an embryonic event making us into a nation of renewed people.