Found just three times in the New Testament (Jn. 8:44Jn. 8:44
English: American Standard Version (1901) - ASV
44 Ye are of your father the devil, and the lusts of your father it is your will to do. He was a murderer from the beginning, and standeth not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.

WP-Bible plugin; 1 Jn. 3:151 Jn. 3:15
English: American Standard Version (1901) - ASV
15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.

WP-Bible plugin), the Greek noun “anthropoktonos” meant “murderer.”  Jesus described Satan as a “murderer” (Jn. 8:44Jn. 8:44
English: American Standard Version (1901) - ASV
44 Ye are of your father the devil, and the lusts of your father it is your will to do. He was a murderer from the beginning, and standeth not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.

WP-Bible plugin).  Christians who “hate” their brethren are murderers and thus do not have “eternal life” (1 Jn. 3:151 Jn. 3:15
English: American Standard Version (1901) - ASV
15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.

WP-Bible plugin).