Imprecation

Then sware they all together and bound themselves by mutual imprecations upon it.

And they all answered him and said: ‘Let us all swear an oath, and all bind ourselves by mutual imprecations not to abandon this plan but to do this thing.’

And they were in all two hundred; who descended in the days of Jared on the summit of Mount Hermon, and they called it Mount Hermon, because they had sworn and bound themselves…