References – AN 5.162: Getting Rid of Resentment (2nd) 
Sutta / Aṅguttara Nikāya / AN 5: Pañcakanipāta / AN 5.162: Dutiyaāghātapaṭivinayasutta

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“Do you remember the sutta that compares people’s behaivor to a puddle?” Answered by Ajahn Pasanno. [Sutta] [Similes] // [Ill-will]

Sutta: AN 5.162 Removing Resentment

The Teaching and the Training [2018], Session 5, Excerpt 4