1)
How does "Hayah Yihyeh
1.
Rashi: Perhaps this will save my bones from being burned. Malbim - his Nevu'ah will be fulfilled. There is no fixed time; therefore, do not leave my bones [elsewhere] even for a short time.
2)
Shomron was not built yet. How did he know to say "in the cities of Shomron"?
1.
Malbim citing Mahari: This shows that the elder was a true Navi.
2.
Malbim: He knew this from Ish ha'Elokim; he explained his words. The elder's bones were saved only in the merit of Ish ha'Elokim (Melachim II, 23:18). He did not have his own merit; he was a false Navi!