Anguttara Nikaya III.126
§123. Gotama Shrine.
On one occasion the Blessed One was staying near Vesali at Gotamaka Shrine. There he addressed the monks, "Monks!"
"Yes, lord," the monks responded.
. The Exalted One said:
‘Monks, I proclaim Dhamma with full comprehension, not without full comprehension. I proclaim Dhamma with causal connexions, not without. I proclaim Dhamma accompanied by wonders, not without wonders. Since I do so there is good reason why I should admonish, there is good reason why I should instruct. Well may ye be glad. Well may ye be satisfied. Well may ye be pleased at the thought: Perfectly enlightened is the Exalted One. Well taught by the Exalted One is Dhamma. Well conducted is the Order.’ So spake the Exalted One.
And those monks were indeed satisfied and delighted with the words of the Exalted One.
And while this explanation was being given, the ten-thousand fold world-system quaked.