WCF 5.6.
As for those wicked and ungodly men whom God, as a righteous Judge, for former sins, doth blind and harden, (Rom. 1:24, 26, 28, Rom. 11:7–8) from them He not only withholdeth His grace whereby they might have been enlightened in their understandings, and wrought upon in their hearts; (Deut. 29:4) but sometimes also withdraweth the gifts which they had, (Matt. 13:12, Matt. 25:29) and exposeth them to such objects as their corruption make occasion of sin; (Deut. 2:30, 2 Kings 8:12–13) and, withal, gives them over to their own lusts, the temptations of the world, and the power of Satan, (Ps. 81:11–12, 2 Thess. 2:10–12) whereby it comes to pass that they harden themselves, even under those means which God useth for the softening of others. (Exod. 7:3, Exod. 8:15, 32, 2 Cor. 2:15–16, Isa. 8:14, 1 Pet. 2:7–8, Isa. 6:9–10, Acts 28:26–27)