26 The next spring Ben-Hadad mustered the Arameans and went up to Aphek to fight against Israel.

Read 1 Kings 20:26 Using Other Translations

And it came to pass at the return of the year, that Benhadad numbered the Syrians, and went up to Aphek, to fight against Israel.
In the spring, Ben-hadad mustered the Syrians and went up to Aphek to fight against Israel.
The following spring he called up the Aramean army and marched out against Israel, this time at Aphek.