Deuteronomy 9:11
It came about at the end of forty days and forty nights that the Lord gave me the two tablets of stone, the tablets of the covenant.
Deuteronomy 9:9
When I went up the mountain to receive the tablets of stone, the tablets of the covenant which the Lord made with you, I remained on the mountain forty days and forty nights; I did not eat food or drink water.
Numbers 10:33
So they set out from the mountain of the Lord (Sinai) three days’ journey; and the ark of the covenant of the Lord went in front of them during the three days’ journey to seek out a resting place for them.
Hebrews 8:6-10
But as it is, Christ has acquired a [priestly] ministry which is more excellent [than the old Levitical priestly ministry], for He is the Mediator (Arbiter) of a better covenant [uniting God and man], which has been enacted and rests on better promises.
Hebrews 9:4