The Didache describes the practices of Baptism in the first century:
Chapter 7. Concerning Baptism
And concerning 
baptism,  
baptize this way:  Having first said all these things, 
baptize into the name of the 
Father, and of the 
Son, and of the 
Holy Spirit, 
Matthew 28:19 in living water.  But if you have not living water, 
baptize into other water; and if you can not in cold, in warm. But if you have not either, pour out water thrice  upon the head into the name of Father and Son and 
Holy Spirit. But before the 
baptism let the baptizer fast, and the 
baptized, and whatever others can; but you shall order the 
baptized to fast one or two days before.
	
	
		
			
			
				
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