NET
51 (Now he did not say this on his own, but because he was high priest that year, he prophesied that Jesus was going to die for the Jewish nation,
Darby
51 But this he did not say of himself; but, being high priest that year, prophesied that Jesus was going to die for the nation;
KJV
51 And this spake he not of himself: but being high priest that year, he prophesied that Jesus should die for that nation;