Mahapadanasutta 1.14

1.14

Now such was the trend of the talk that was going on among the brethren when the Exalted One, rousing himself at eventide from meditation, went to the pavilion in the Kareri grounds, and took his seat on the mat spread out for him. And when he had sat down, he said to the brethren: — ' What is the talk on which you are engaged, brethren, as ye sit
here, and what was the subject of conversation between you? ' [And they told him all.]