'Behind' in the Bible

yea, it cometh to pass, from that day, half of my servants are working in the business, and half of them are keeping hold of both the spears, the shields, and the bows, and the coats of mail; and the heads are behind all the house of Judah.

'And they are disobedient, and rebel against Thee, and cast Thy law behind their back, and Thy prophets they have slain, who testified against them, to bring them back unto Thee, and they do great despisings,