Exodus 7:8

“And the Lord spake unto Moses and unto Aaron, etc.] After he had given them their commission, and instructions to go to Pharaoh, and a little before they went in to him: saying, as follows.”

“7:8–12:30 This section divides the events of rescue into two parts: the plagues (7:8–11:10) and the Passover (12:1-30). God demonstrated that he is the Lord of life and death and nothing has any power against him (see Isa 43:13). The God of the patriarchs is also the God of the universe. 7:8–11:10 In the plagues, God showed that all the Egyptians’ so-called gods, supposed to be sources of life, were really sources of death apart from the life-giving power of the Lord (see 12:12; 18:11).”

“The negotiations of Moses and Aaron as messengers of Jehovah with the king of Egypt, concerning the departure of Israel from his land, commenced with a sign, by which the messengers of God attested their divine mission in the presence of Pharaoh ( Exo 7:8-13), and concluded with the announcement of the last blow that God would inflict upon the hardened king ( Exo 11:1-10). The centre of these negotiations, or rather the main point of this lengthened section, which is closely connected throughout, and formally rounded off by Exo 11:9-10 into an inward unity, is found in the nine plagues which the messengers of Jehovah brought upon Pharaoh and his kingdom at the command of Jehovah, to bend the…”