The 
			laws concerning redemption of the first-born of man are referred to 
			in:
			
			
			Sefer Shmot, Exodus  13:12-15
			
			12. 
			that thou shalt set apart unto the LORD all that openeth the womb; 
			every firstling that is a male, which thou hast coming of a beast, 
			shall be the LORD'S. 
			
			13. And every firstling of an ass thou shalt redeem with a lamb; 
			and if thou wilt not redeem it, then thou shalt break its neck; and 
			all the first-born of man among thy sons shalt thou redeem. 
			14. And it shall be when thy son asketh thee in time to come, 
			saying: What is this? that thou shalt say unto him: By strength of 
			hand the LORD brought us out from Egypt, from the house of bondage;
			
			15. and it came to pass, when Pharaoh would hardly let us go 
			that the LORD slew all the firstborn in the land of Egypt, both the 
			first-born of man, and the first-born of beast; therefore I 
			sacrifice to the LORD all that openeth the womb, being males; but 
			all the first-born of my sons I redeem.
			
			
			Sefer Shmot, Exodus  22:28
			
			28 
			Thou shalt not delay to offer of the fulness of thy harvest, and of 
			the outflow of thy presses. The first-born of thy sons shalt thou 
			give unto Me.
			
			
			Sefer Shmot, Exodus  34:20
			20 And the firstling of an ass thou shalt redeem with a lamb; 
			and if thou wilt not redeem it, then thou shalt break its neck. All 
			the first-born of thy sons thou shalt redeem. And none shall appear 
			before Me empty.
			
			
			Sefer Vayikra, Leviticus 12:2,4
			2. 
			Speak unto the children of Israel, saying: If a woman be delivered, 
			and bear a man-child, then she shall be unclean seven days; as in 
			the days of the impurity of her sickness shall she be unclean. 
			
			3. And in the eighth day the flesh of his foreskin shall be 
			circumcised. 
			4. And she shall continue in the blood of purification three and 
			thirty days; she shall touch no hallowed thing, nor come into the 
			sanctuary, until the days of her purification be fulfilled.
			
			Sefer Bamidbar (Numbers) Chapter 3
			45 
			'Take the Levites instead of all the first-born among the children 
			of Israel, and the cattle of the Levites instead of their cattle; 
			and the Levites shall be Mine, even the LORD'S. 
			
			Sefer Bamidbar, Chapter 8
			14. Thus shalt thou separate the Levites from among the children 
			of Israel; and the Levites shall be Mine. 
			15. And after that shall the Levites go in to do the service of 
			the tent of meeting; and thou shalt cleanse them, and offer them for 
			a wave-offering. 
			16 For they are wholly given unto Me from among the children of 
			Israel; instead of all that openeth the womb, even the first-born of 
			all the children of Israel, have I taken them unto Me. 
			17. For all the first-born among the children of Israel are 
			Mine, both man and beast; on the day that I smote all the first-born 
			in the land of Egypt I sanctified them for Myself. 
			18. And I have taken the Levites instead of all the first-born 
			among the children of Israel. 
			
			Sefer Bamidbar (Numbers) Chapter 18
			16. And their redemption-money--from a month old shalt thou 
			redeem them--shall be, according to thy valuation, five shekels of 
			silver, after the shekel of the sanctuary--the same is twenty gerahs.