'Behoveth' in the Bible

and began to teach them, that it behoveth the Son of Man to suffer many things, and to be rejected by the elders, and chief priests, and scribes, and to be killed, and after three days to rise again;

And they were questioning him, saying, that the scribes say that Elijah it behoveth to come first.

and to all the nations it behoveth first that the good news be proclaimed.