The Second Epistle of St. Paul to the Thessalonians (Author Paul)
2:13nos autem debemus gratias agere Deo semper pro vobis fratres dilecti a Deo quod elegerit nos Deus primitias in salutem in sanctificatione Spiritus et fide veritatis
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.