Exodus 4:29 - 5:5 KJV
29 And Moses and Aaron went and gathered together all the elders of the children of Israel:
30 And Aaron spake all the words which the LORD had spoken unto Moses, and did the signs in the sight of the people.
31 And the people believed: and when they heard that the LORD had visited the children of Israel, and that he had looked upon their affliction, then they bowed their heads and worshipped.
01 And afterward Moses and Aaron went in, and told Pharaoh, Thus saith the LORD God of Israel, Let my people go, that they may hold a feast unto me in the wilderness.
02 And Pharaoh said, Who is the LORD, that I should obey his voice to let Israel go? I know not the LORD, neither will I let Israel go.
03 And they said, The God of the Hebrews hath met with us: let us go, we pray thee, three days' journey into the desert, and sacrifice unto the LORD our God; lest he fall upon us with pestilence, or with the sword.
04 And the king of Egypt said unto them, Wherefore do ye, Moses and Aaron, let the people from their works? get you unto your burdens.
05 And Pharaoh said, Behold, the people of the land now are many, and ye make them rest from their burdens.
And this what the Most High was waiting for: for when Pharaoh took away the Shabbat, he forced the people to break His creation pattern, which they were observing. Mosheh and Ahron gathered the people together, in the above passage, in the Shabbat: their only day of rest. The word rest underlined above in the last verse is the verb shabat/shabbat, (only differentiated by pointing).