WCF 3.6.
As God hath appointed the elect unto glory, so hath He, by the eternal and most free purpose of His will, foreordained all the means thereunto. (1 Pet. 1:2, Eph. 1:4–5, Eph. 2:10, 2 Thess. 2:13) Wherefore, they who are elected, being fallen in Adam, are redeemed by Christ, (1 Thess. 5:9–10, 1 Tit. 2:14) are effectually called unto faith in Christ by His Spirit working in due season, are justified,adopted, sanctified, (Rom. 8:30, Eph. 1:5, 2 Thess. 2:13) and kept by His power, through faith, unto salvation. (1 Pet. 1:5) Neither are any other redeemed by Christ, effectually called, justified, adopted, sanctified, and saved, but the elect only. (John 17:9, Rom. 8:28, John 6:64–65, John 10:26, John 8:47, 1 John 2:19)