Catena Fidei

Isaiah 1:20 (WEB)
but if you refuse and rebel, you will be devoured with the sword; for the LORD’s mouth has spoken it.”

Catechism · 1

§2100Article 1 · The First CommandmentRead at vatican.va
“The prophets of the Old Covenant often denounced sacrifices that were not from the heart or not coupled with love of neighbor.” — Catechism footnote: Cf. Am 5:21-25; Isa 1:10-20.

Origen, Against Celsus VI.57Book VI
“Such also is the view indicated by these words: “If ye be willing and obedient, ye shall eat the good of the land; but if ye refuse and rebel, a sword shall devour you.”” — editor's note: Cf. Isa. i. 19, 20.
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Origen, Against Celsus VI.62Book VI
“Celsus, again, having perhaps misunderstood the words, “For the mouth of the Lord hath spoken it,” or perhaps because some ignorant individuals had rashly ventured upon the explanation of such things, and not understanding, moreover, on what principles…” — editor's note: Cf. Isa. i. 20.
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Origen, De Principiis III.1Book III
“But if you be unwilling, and will not hear me, the sword shall consume you; for the mouth of the Lord has spoken this.”” — editor's note: Isa. i. 19, 20.
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Origen, De Principiis III.2Book III
“Isaiah too: “If you are willing, and hear me, ye shall eat the good of the land; but if ye be unwilling, and will not hear me, the sword will consume you: for the mouth of the Lord hath spoken it.”” — editor's note: Isa. i. 19, 20.
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Cyril of Jerusalem, Catechetical Lectures Lecture 5
“…be willing, and hearken unto Me, ye shall eat the good things of the land: but if ye be not willing, neither hearken unto Me, the sword shall devour you, &c.: and again, As ye presented your members as servants to uncleanness and to iniquity unto iniquity, even so now present your members as servants to…” — editor's note: Is. i. 19, 20.
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Clement of Alexandria, Exhortation to the Heathen Chapter 10
““But if ye obey Me not, and are unwilling, the sword and fire shall devour you:” this is the penalty of disobedience.” — editor's note: Isa. i. 20, xxxiii. 11.
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Clement of Alexandria, The Stromata, or Miscellanies VI.6Book VI
“But if ye hear Me not, and are not willing, the sword shall devour you: for the mouth of the Lord hath spoken these things.”” — editor's note: Isa. i. 19, 20.
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Tertullian, The Five Books Against Marcion III.22Book III
“So likewise that conditional threat of the sword, “If ye refuse and hear me not, the sword shall devour you,” has proved that it was Christ, for rebellion against whom they have perished.” — editor's note: Isa. i. 20.
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Cyprian of Carthage, Three Books of Testimonies Against the Jews I.25Book I
“And if ye be willing and listen to me, ye shall eat of the good of the land; but if ye be unwilling, and will not hear me, the sword shall consume you; for the mouth of the Lord hath spoken these things.”” — editor's note: Isa. i. 15–20.
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