an.4.189 Aṅguttara Nikāya (Numbered Discourses)
Things to be Realized
“Mendicants, these four things should be realized.What four?
There are things to be realized with direct meditative experience.
There are things to be realized with recollection.
There are things to be realized with vision.
There are things to be realized with wisdom.
What things are to be realized with direct meditative experience?
The eight liberations.
What things are to be realized with recollection?
Past lives.
What things are to be realized with vision?
The passing away and rebirth of sentient beings.
What things are to be realized with wisdom?
The ending of defilements.
These are the four things to be realized.”