I have heard that on one occasion the Blessed One was staying near Sāvatthī at Jeta's Grove, Anāthapiṇḍika's monastery. And on that occasion the Blessed One was instructing, urging, rousing, & encouraging the monks with Dhamma-talk concerned with unbinding. The monks — receptive, attentive, focusing their entire awareness, lending ear — listened to the Dhamma.
Then, on realizing the significance of that, the Blessed One on that occasion exclaimed: