References – AN 3.7: Blameworthy 
“Did you say, ‘Nibbāna is the source of all virtue?’” Answered by Ajahn Amaro and Ajahn Kaccāna. [Nibbāna] [Virtue] // [Ven. Nāgasena]
Sutta: Milindapañha 320: “Nibbāna, once realized, is the source of the beauty of the virtues of all living beings.” Quoted in The Island by Ajahn Pasanno and Ajahn Amaro, p. 38.
Follow-up “” [Unconditioned]
Response by Ajahn Amaro. [Arahant]
Sutta: AN 9.7-8: What an arahant can’t do.
Sutta: AN 3.7: Uposatha Sutta.
Response by Ajahn Pasanno. [Ajahn Mahā Boowa] [Compassion]