What is the mens rea element required for murder in heat of passion?

"The mens rea element required for murder is a state of mind constituting either express or implied malice. A person who kills without malice does not commit murder. Heat of passion is a mental state that precludes the formation of malice and reduces an unlawful killing from murder to manslaughter. Heat of passion arises if, ' "at the time of the killing, the reason of the accused was obscured or disturbed by passion to such an extent as would cause the ordinarily reasonable person of average disposition to act rashly and without deliberation and reflection, and from such passion rather than from judgment." ' [Citation.] Heat of passion, then, is a state of mind caused by legally sufficient provocation that causes a person to act, not out of rational thought but out of unconsidered reaction to the provocation. While some measure of thought is required to form either an intent to kill or a conscious disregard for human life, a person who acts without reflection in response to adequate provocation does not act with malice." (People v. Beltran (2013) 56 Cal.4th 935, 942 fn. omitted.) "Provocation is adequate only when it would render an ordinary person of average disposition 'liable to act rashly or without due deliberation and reflection, and from this passion rather than from judgment.' [Citation.]" (Id. at. p. 957.)

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