 In the three quotations Jesus gives, verse 4, man shall not live by bread alone, but by every word that proceeds from the mouth of God. Verse 7, it is written again, you shall not tempt the Lord your God. Verse 10, away with you Satan, for it is written, you shall worship the Lord your God, and him only shall you serve. Those quotations come in order from Deuteronomy 8.3, Deuteronomy 6.16, and Deuteronomy 6.13.