In Chapter 4 of Luke, Jesus said that when
there was a great famine in the land during
Elijah's time; there were many widows in
the Israel.

"But unto none of them was Elias sent, save
unto Sarepta, a city of Sidon, unto a woman
that was a widow" [vs 26].

Even though Elijah had God's power in his
life, he couldn't make it work for everybody.
But because he was sent to this particular
widow's house, there was a continuous
miracle. The meal barrel never emptied, it
kept giving out meal and the cruse of oil
never stopped.