'Fast' in the Bible

And [while] he was holding fast to Peter and John, all the people ran together to them in the portico called Solomon's, utterly astonished.

And [because] considerable time had passed and the voyage was now dangerous because even the Fast was already over, Paul strongly recommended,

But falling into a place of crosscurrents, they ran the ship aground. And the bow stuck fast [and] stayed immovable, but the stern was being broken up by the violence.