One who incites an argument between those who love each other, Heaven Forbid, by means of his Lashon HaRa and Rechilus, is [consequently] abominable before HaShem, this sin being more severe than the sin of haughtiness, lying, and murder, [among other severe sins], as it says in Mishlei (6; 16 – 19): “There are six [individuals] whom HaShem hates, and the seventh is an abomination of His Soul: Haughty eyes, speaking falsehood, and hands that spill innocent blood… and those who incite quarrels between brothers”; Our Sages of Blessed Memory said that this [sin of inciting quarrels between brothers] is the seventh [sin], it being the most severe of all [of the seven sins listed in the p'sukim].
 “Shechinah” is G-d’s Divine Presence.
 This teaching is found in Midrash Rabbah on Parshas Shoftim and Devarim Rabbah, Parsha 5, 10.
 This teaching from Midrash Rabbah is found in Parshas Ki Seitze, Devarim Rabbah Parsha (6, 14).
 The above teaching and RaSh”I’s explanation can also be found in maseches “Gittin” (56, 57b), quoted in the name of Rabbi Elazar, following (RaSh”I’s explanation is preceded by the introductory phrase "והינו" – “and it is”).
 This teaching can be found in Vayikra Rabbah (parsha 16, 1).
 The verses read: “There are six that HaShem hates and the seventh [sin] is the abomination of His soul. Haughty eyes, a lying tongue, and hands that spill innocent blood. A heart that devises sinful thoughts, feet that quicken to run to evil. One who speaks falsehoods and testifies falsely, and one who incites quarrels between brothers.” (Mishlei: 6; 16 – 19)