an.1.347 Aṅguttara Nikāya (Numbered Discourses)

347
… so too the sentient beings who get the essence of the meaning, the essence of the teaching, and the essence of freedom are few,
while the sentient beings who don’t get the essence of the meaning, the essence of the teaching, and the essence of freedom are many.
So you should train like this:
‘We will get the essence of the meaning, the essence of the teaching, the essence of freedom.’
That’s how you should train.”