Romans
King James Version (KJV)

“But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;”
King James Version (KJV)
10:8 But what saith he - Moses. Even these words, so remarkably applicable to the subject before us. All is done ready to thy hand. The word is nigh thee - Within thy reach; easy to be understood, remembered, practised. This is eminently true of the word of faith - The gospel. Which we preach - The sum of which is, If thy heart believe in Christ, and thy life confess him, thou shalt be saved.
Ro 10:8 But what saith it? What does God's righteousness demand? It replies that we do not have to go either to heaven or to hades to lay hold of salvation, but that the word is nigh thee. The gospel is at hand. Faith in it, nourished in the heart and openly confessed, will secure salvation. This is more fully explained in the next verse.