(Sermon starts at 23:20 in the recording).
5 So it was, when all the kings of the Amorites who were on the west side of the Jordan, and all the kings of the Canaanites who were by the sea, heard that the Lord had dried up the waters of the Jordan from before the children of Israel until we had crossed over, that their heart melted; and there was no spirit in them any longer because of the children of Israel.
2 At that time the Lord said to Joshua, “Make flint knives for yourself, and circumcise the sons of Israel again the second time.” 3 So Joshua made flint knives for himself, and circumcised the sons of Israel at the hill of the foreskins. 4 And this is the reason why Joshua circumcised them: All the people who came out of Egypt who were males, all the men of war, had died in the wilderness on the way, after they had come out of Egypt. 5 For all the people who came out had been circumcised, but all the people born in the wilderness, on the way as they came out of Egypt, had not been circumcised. 6 For the children of Israel walked forty years in the wilderness, till all the people who were men of war, who came out of Egypt, were consumed, because they did not obey the voice of the Lord—to whom the Lord swore that He would not show them the land which the Lord had sworn to their fathers that He would give us, “a land flowing with milk and honey.” 7 Then Joshua circumcised their sons whom He raised up in their place; for they were uncircumcised, because they had not been circumcised on the way.
8 So it was, when they had finished circumcising all the people, that they stayed in their places in the camp till they were healed. 9 Then the Lord said to Joshua, “This day I have rolled away the reproach of Egypt from you.” Therefore the name of the place is called Gilgal to this day.
10 Now the children of Israel camped in Gilgal, and kept the Passover on the fourteenth day of the month at twilight on the plains of Jericho.
Joshua 5:1-10 (NKJV)
17 When Abram was ninety-nine years old, the Lord appeared to Abram and said to him, “I am Almighty God; walk before Me and be blameless. 2 And I will make My covenant between Me and you, and will multiply you exceedingly.” 3 Then Abram fell on his face, and God talked with him, saying: 4 “As for Me, behold, My covenant is with you, and you shall be a father of many nations. 5 No longer shall your name be called Abram, but your name shall be Abraham; for I have made you a father of many nations. 6 I will make you exceedingly fruitful; and I will make nations of you, and kings shall come from you. 7 And I will establish My covenant between Me and you and your descendants after you in their generations, for an everlasting covenant, to be God to you and your descendants after you. 8 Also I give to you and your descendants after you the land in which you are a stranger, all the land of Canaan, as an everlasting possession; and I will be their God.”
9 And God said to Abraham: “As for you, you shall keep My covenant, you and your descendants after you throughout their generations. 10 This is My covenant which you shall keep, between Me and you and your descendants after you: Every male child among you shall be circumcised; 11 and you shall be circumcised in the flesh of your foreskins, and it shall be a sign of the covenant between Me and you. 12 He who is eight days old among you shall be circumcised, every male child in your generations, he who is born in your house or bought with money from any foreigner who is not your descendant. 13 He who is born in your house and he who is bought with your money must be circumcised, and My covenant shall be in your flesh for an everlasting covenant. 14 And the uncircumcised male child, who is not circumcised in the flesh of his foreskin, that person shall be cut off from his people; he has broken My covenant.”
Genesis 17:1-14 (NKJV)