C. F. Keil and Franz Delitzsch on 2 Chronicles 16:9

2Ch 16:9 “For Jahve, His eyes run to and fro throughout the whole earth, to show Himself strong with those whose heart is devoted to Him;” i.e., for Jahve, who looks forth over all the earth, uses every opportunity wonderfully to succour those who are piously devoted to Him. עם התחזק, to help mightily, as in 1Ch 11:10. אליו שׁלם עם־לבבם is a relative sentence without the relative אשׁר with עם; cf. 1Ch 15:12. “Thou hast done foolishly, therefore,” scil. because thou hast set thy trust upon men instead of upon Jahve, “for from henceforth there shall be wars to thee” (thou shalt have war). In these words the prophet does not announce to Asa definite wars, but only expresses the general idea that Asa by his godless policy would bring only wars (מלחמות in indefinite universality), not peace, to the kingdom. History confirms the truth of this announcement, although we have no record of any other wars which broke out under Asa.