'Praying' in the Bible

"Gather together and come; draw near and enter, your fugitives from the nations. Those who carry around their wooden idols know nothing, nor do those who keep praying to a god that cannot save.

“Declare and present your defense of idols;Indeed, let them consult together.Who announced this [rise of Cyrus and his conquests] long before it happened?Who declared it long ago?Was it not I, the Lord?And there is no other God besides Me,A [consistently and uncompromisingly] just and righteous God and a Savior;There is none except Me.

I post watchmen on your walls, O Jerusalem; they should keep praying all day and all night. You who pray to the Lord, don't be silent!