Najib Razak quote: “Soak it (the keris) with Malaysian Chinese blood.”

“The purpose of separation of church and state is to keep forever from these shores the ceaseless strife that has soaked the soil of Europe in blood for centuries.”

James Madison (1751–1836) 4th president of the United States (1809 to 1817)

Though this had been cited as being from a letter objecting to the use of government land for churches in 1803 https://web.archive.org/web/20061123043628/http://www.positiveatheism.org///hist/quotes/madison.htm#PHONYMAD, as quoted in 2000 Years of Disbelief: Famous People With the Courage to Doubt (1996) edited by James A Haught, no original source for this has yet been found.
Misattributed

“The tongue, the Chinese say,
is like a sharp knife:
it kills
without drawing blood.”

Anne Sexton (1928–1974) poet from the United States

"The Dead Heart"
The Awful Rowing Toward God (1975)

“Its history is soaked in blood of the supposed enemies of Islam. But all this is denied by Marxists who always try to cover up the black spots of Muslim rule with thick coats of whitewash.”

K. S. Lal book The Legacy of Muslim Rule in India

Source: The Legacy of Muslim Rule in India (1992), Chapter 3

“Terror made me cruel; and finding it useless to attempt shaking the creature off, I pulled its wrist on to the broken pane, and rubbed it to and fro till the blood ran down and soaked the bedclothes…”

Emily Brontë book Wuthering Heights

Mr. Lockwood (Ch. III).
Source: Wuthering Heights (1847)
Context: As it spoke I discerned, obscurely, a child's face looking through the window. Terror made me cruel; and finding it useless to attempt shaking the creature off, I pulled its wrist on to the broken pane, and rubbed it to and fro till the blood ran down and soaked the bed-clothes: still it wailed, "Let me in!", and maintained its tenacious grip, almost maddening me with fear.

“The hope of a benevolent civilization was shattered in the blood-soaked trenches of the First World War. The "war to end all wars" claimed sixteen million lives, and left embers which kindled an even more catastrophic conflagration.”

Bernard Lown (1921–2021) American cardiologist developer of the DC defibrillator and the cardioverter, as well as a recipient of the…

A Prescription for Hope (1985)
Context: The hope of a benevolent civilization was shattered in the blood-soaked trenches of the First World War. The "war to end all wars" claimed sixteen million lives, and left embers which kindled an even more catastrophic conflagration.
Over the sorry course of 5,000 years of endless conflicts, some limits had been set on human savagery. Moral safeguards proscribed killing unarmed civilians and health workers, poisoning drinking waters, spreading infection among children and the disabled, and burning defenseless cities. But the Second World War introduced total war, unprincipled in method, unlimited in violence, and indiscriminate in victims. The ovens of Auschwitz and the atomic incineration of Hiroshima and Nagasaki inscribed a still darker chapter in the chronicle of human brutality. The prolonged agony which left 50 million dead did not provide an enduring basis for an armistice to barbarism. On the contrary, arsenals soon burgeoned with genocidal weapons equivalent to many thousands of World War II's.
The advent of the nuclear age posed an unprecedented question: not whether war would exact yet more lives but whether war would preclude human existence altogether.