Lovingkindness and Compassion of the Buddha?
You've asked about metta.

The deepest example of metta does not use the word metta.

In SN6.1, we hear that Brahmā Sahampati kneels and asks the Buddha to teach the Dhamma.


  Sir, let the Blessed One teach the Dhamma! Let the Holy One teach the Dhamma!


To which the Buddha humbly replied: 


  Thinking it would be troublesome, Brahmā, I did not teach the sophisticated, sublime Dhamma among humans.


The Buddha spent the rest of his life teaching. Now that is the very definition of metta.