US Constitution, Fifth Amendment
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offence to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.
Texas Constitution
http://www.statutes.legis.state.tx.us/Docs/CN/htm/CN.1.htm
Sec. 17. TAKING, DAMAGING, OR DESTROYING PROPERTY FOR PUBLIC USE; SPECIAL PRIVILEGES AND IMMUNITIES; CONTROL OF PRIVILEGES AND FRANCHISES.
(a) No person's property shall be taken, damaged, or destroyed for or applied to public use without adequate compensation being made, unless by the consent of such person, and only if the taking, damage, or destruction is for:
(1) the ownership, use, and enjoyment of the property, notwithstanding an incidental use, by:
(A) the State, a political subdivision of the State, or the public at large; or
(B) an entity granted the power of eminent domain under law; or
(2) the elimination of urban blight on a particular parcel of property.
(b) In this section, "public use" does not include the taking of property under Subsection (a) of this section for transfer to a private entity for the primary purpose of economic development or enhancement of tax revenues.
(c) On or after January 1, 2010, the legislature may enact a general, local, or special law granting the power of eminent domain to an entity only on a two-thirds vote of all the members elected to each house.
(d) When a person's property is taken under Subsection (a) of this section, except for the use of the State, compensation as described by Subsection (a) shall be first made, or secured by a deposit of money; and no irrevocable or uncontrollable grant of special privileges or immunities shall be made; but all privileges and franchises granted by the Legislature, or created under its authority, shall be subject to the control thereof.
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offence to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.
Texas Constitution
http://www.statutes.legis.state.tx.us/Docs/CN/htm/CN.1.htm
Sec. 17. TAKING, DAMAGING, OR DESTROYING PROPERTY FOR PUBLIC USE; SPECIAL PRIVILEGES AND IMMUNITIES; CONTROL OF PRIVILEGES AND FRANCHISES.
(a) No person's property shall be taken, damaged, or destroyed for or applied to public use without adequate compensation being made, unless by the consent of such person, and only if the taking, damage, or destruction is for:
(1) the ownership, use, and enjoyment of the property, notwithstanding an incidental use, by:
(A) the State, a political subdivision of the State, or the public at large; or
(B) an entity granted the power of eminent domain under law; or
(2) the elimination of urban blight on a particular parcel of property.
(b) In this section, "public use" does not include the taking of property under Subsection (a) of this section for transfer to a private entity for the primary purpose of economic development or enhancement of tax revenues.
(c) On or after January 1, 2010, the legislature may enact a general, local, or special law granting the power of eminent domain to an entity only on a two-thirds vote of all the members elected to each house.
(d) When a person's property is taken under Subsection (a) of this section, except for the use of the State, compensation as described by Subsection (a) shall be first made, or secured by a deposit of money; and no irrevocable or uncontrollable grant of special privileges or immunities shall be made; but all privileges and franchises granted by the Legislature, or created under its authority, shall be subject to the control thereof.
