'Fasten' in the Bible

and I say to them, 'Let not the gates of Jerusalem be opened till the heat of the sun, and while they are standing by let them shut the doors, and fasten, and appoint guards of the inhabitants of Jerusalem, each in his guard, and each over-against his house.'

but Paul having gathered together a quantity of sticks, and having laid them upon the fire, a viper -- out of the heat having come -- did fasten on his hand.