'Unthinking' in the Bible

I was stupid and didn’t understand;I was an unthinking animal toward You.

An unthinking person believes everything, but the prudent one thinks before acting.

unthinking! did not He who made the outside also the inside make?

And God said to him, Unthinking one! this night thy soul they shall require from thee, and what things thou didst prepare -- to whom shall they be?