Hello acinteyyo, all,
A summary here: "The Seven Stages of Purification" and "The Sixteen Insight Knowledges"http://www.leighb.com/7sop16ik.htm
The above is taken principally from MN 24 - Ratha-vinita Sutta (The Relay Chariots Sutta) and from Ven. Matara Sri Nañarama Mahathera's book The Seven Stages of Purification and the Insight Knowledges.
The details of the first 2 Stages of Purification can be found in the Graduated Training which occurs many times thruout the suttas.
The last 5 Stages - the 16 Insight Knowledges are briefly sketched in many places in the suttas as
Insights [of the higher stages of the Path]
The most detailed exposition of the Insight Knowledges found in the suttas is in SN 12.23 - Upanisa Sutta (Transcendental Dependent Arising).
And finally, these Seven Stages form the outline for the Visuddhimagga (Path of Purification), the commentary from about 500 AD. Each stage is discussed in detail and the Insight Knowledges (the last 5 Stages) are dicussed quite excellently in Chapters 18 - 23.