1 Kings 11:29

And it came to pass at that time, when Jeroboam went out of
Jerusalem
Either to enter upon his new office: or having been with Solomon to pay in the revenues, and to make up his accounts with him was going back to the country to do the duty of his office:

that the prophet Ahijah the Shilonite found him in the way;
not accidentally, but purposely was in the way to meet him, and converse with him; this prophet was of the city of Shiloh, and where was now his abode, see ( 1 Kings 14:2 )

and he had clad himself with a new garment;
not Jeroboam, but the prophet, and that by the direction of the Lord, for the following purpose:

and they two were alone in the field:
it is possible Jeroboam might have some servants with him; but Ahijah desiring some private conversation with him, he sent them onwards, or bid them stay at some distance; who yet might be capable of observing what was done, though not of hearing what was said; or otherwise how should Solomon come to the knowledge of it? ( 1 Kings 11:40 ) .