Why was no one there when I came?
When I called, why was there no one to answer?
Is my hand shortened at all, that it cannot redeem?
Or have I no power to deliver?
Behold, at my rebuke I dry up the sea,
I make the rivers a wilderness;
their fish stink because there is no water,
and they die of thirst. Bible see other translations

“Why was no one there when I came?” God is making the point that He had come to Israel and called to Israel to bring them back to Himself, but Israel would not repent and return to Him.

Commentary for: Isaiah 50:2