The Ten Commandments are located in two different sections in the Old Testament. The Ten Commandments is one of the CORE doctrine pieces in the Old Testament.

Exodus 20: 

2 "I [am] Jehovah thy God, who hath brought thee out of the land of Egypt, out of a house of servants."

3 "Thou hast no other Gods before Me."

4 "Thou dost not make to thyself a graven image, or any likeness which [is] in the heavens above, or which [is] in the earth beneath, or which [is] in the waters under the earth." 

5 "Thou dost not bow thyself to them, nor serve them: for I, Jehovah thy God, [am] a zealous God, charging iniquity of fathers on sons, on the third [generation], and on the fourth, of those hating Me,"

6 "and doing kindness to thousands, of those loving Me and keeping My commands."

7 "Thou dost not take up the name of Jehovah thy God for a vain thing, for Jehovah acquitteth not him who taketh up His name for a vain thing."

8 "Remember the Sabbath-day to sanctify it;" 

9 "six days thou dost labour, and hast done all thy work," 

10 "and the seventh day [is] a Sabbath to Jehovah thy God; thou dost not do any work, thou, and thy son, and thy daughter, thy man-servant, and thy handmaid, and thy cattle, and thy sojourner who is within thy gates," 

11 "for six days hath Jehovah made the heavens and the earth, the sea, and all that [is] in them, and resteth in the seventh day; therefore hath Jehovah blessed the Sabbath-day, and doth sanctify it."

12 "Honour thy father and thy mother, so that thy days are prolonged on the ground which Jehovah thy God is giving to thee."

13 "Thou dost not murder."

14 "Thou dost not commit adultery."

15 "Thou dost not steal."

16 "Thou dost not answer against thy neighbour a false testimony."

17 "Thou dost not desire the house of thy neighbour, thou dost not desire the wife of thy neighbour, or his man-servant, or his handmaid, or his ox, or his ass, or anything which [is] thy neighbour’s."

Deuteronomy 5:

6 "I Jehovah [am] thy God, who hath brought thee out from the land of Egypt, from a house of servants."

7 "Thou hast no other gods in My presence."

8 "Thou dost not make to thee a graven image, any similitude which [is] in the heavens above, and which [is] in the earth beneath, and which [is] in the waters under the earth;"

9 "thou dost not bow thyself to them nor serve them, for I Jehovah thy God [am] a zealous God, charging iniquity of fathers on children, and on a third [generation], and on a fourth, to those hating Me;"

10 "and doing kindness to thousands, to those loving Me, and to those keeping My commands."

11 "Thou dost not take up the Name of Jehovah thy God for a vain thing, for Jehovah doth not acquit him who taketh up His Name for a vain thing."

12 "Observe the day of the sabbath -- to sanctify it, as Jehovah thy God hath commanded thee;"

13 "six days thou dost labour, and hast done all thy work,"

14 "and the seventh day [is] a sabbath to Jehovah thy God; thou dost not do any work, thou, and thy son, and thy daughter, and thy man-servant, and thy handmaid, and thine ox, and thine ass, and all thy cattle, and thy sojourner who [is] within thy gates; so that thy man-servant, and thy handmaid doth rest like thyself;"

15 "and thou hast remembered that a servant thou hast been in the land of Egypt, and Jehovah thy God is bringing thee out thence by a strong hand, and by a stretched-out arm; therefore hath Jehovah thy God commanded thee to keep the day of the sabbath."

16 "Honour thy father and thy mother, as Jehovah thy God hath commanded thee, so that thy days are prolonged, and so that it is well with thee, on the ground which Jehovah thy God is giving to thee."

17 "Thou dost not murder."

18 "Thou dost not commit adultery."

19 "Thou dost not steal."

20 "Thou dost not answer against thy neighbour -- a false testimony."

21 "Thou dost not desire thy neighbour's wife; nor dost thou covet thy neighbour's house, his field, and his man-servant, and his handmaid, his ox, and his ass, and anything which [is] thy neighbour's."