Scriptures of the Feasts Of Yehovah
Deuteronomy 5:1 – 28
5 And Moses called all Israel, and said unto them, Hear, O Israel, the statutes and judgments which I speak in your ears this day, that ye may learn them, and keep, and do them.
2 The Lord our God made a covenant with us in Horeb.
3 The Lord made not this covenant with our fathers, but with us, even us, who are all of us here alive this day.
4 The Lord talked with you face to face in the mount out of the midst of the fire,
5 (I stood between the Lord and you at that time, to shew you the word of the Lord: for ye were afraid by reason of the fire, and went not up into the mount;) saying,
6 I am Yehovah thy God, which brought thee out of the land of Egypt, from the house of bondage.
Skipping down to verse 23
23 And it came to pass, when ye heard the voice out of the midst of the darkness, (for the mountain did burn with fire,) that ye came near unto me, even all the heads of your tribes, and your elders;
24 And ye said, Behold, Yehovah our God hath shewed us his glory and his greatness, and we have heard his voice out of the midst of the fire: we have seen this day that God doth talk with man, and he liveth.
25 Now therefore why should we die? for this great fire will consume us: if we hear the voice of Yehovah our God any more, then we shall die.
26 For who is there of all flesh, that hath heard the voice of the living God speaking out of the midst of the fire, as we have, and lived?
27 Go thou near, and hear all that Yehovah our God shall say: and speak thou unto us all that Yehovah our God shall speak unto thee; and we will hear it, and do it.
28 And Yehovah heard the voice of your words, when ye spake unto me; and Yehovah said unto me, I have heard the voice of the words of this people, which they have spoken unto thee: they have well said all that they have spoken.
Therefore, as a memorial to remember that day which God spoke, the nation of Israel was to look for, and be ready for, the first day of the seventh month, which would be called the Day of Trumpets.