The Bible refers to itself in 2 Timothy 3, in Hebrews 4, and in Psalm 119.
In 2 Timothy 3:16:
16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
In Hebrews 4:12:
12 For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
In Psalms 119:105:
105 Thy word is a lamp unto my feet, and a light unto my path.