To morrow, by that time the sun be hot. — That is, about noon the army of rescue will be at hand. The distance from Bezek to Jabesh was not much over twenty miles.
Related Commentaries of 1 Samuel 11:9
1 Samuel 11:9
9 And they said unto the messengers that came, Thus shall ye say unto the men of Jabeshgilead, To morrow, by that time the sun be hot, ye shall have help.a And the messengers came and shewed it to the men of Jabesh; and they were glad.