What are the Promises of God to the elect?

Some folks believe that there are separate groups of people who are being saved, and therefore the Bible must be cut up into different parts, since those different parts apply to different groups. I would like to attempt to put this false teaching to bed with the use of New and Old Testament scriptures. Isn't it important to know that the whole Bible is the Word of God, Old and New Testament? The Holy Spirit, which is the testifier of Jesus Christ, does testify to the heart of the contrite believer, when they read the Old and New Testament, the truths of God. So let's talk about the hope of the elect! Robert Begnaud