權門

Attested since the Eastern Han period [25 - 220 CE].

Used literally in Heshang Gong's commentary on Dao De Jing (English translation by Reid (2015)^[1]):

• 絕巧者，詐偽亂真也。棄利者，塞貪路閉權門也。 [Classical Chinese, trad.]

  ---

  绝巧者，诈伪乱真也。弃利者，塞贪路闭权门也。 [Classical Chinese, simp.]

  From: c. 2nd century CE, Riverside Elder's Chapter-and-Verse Commentary on the Classic of the Way and Virtue (《老子河上公章句》)

  Jué qiǎo zhě, zhàwěi luànzhēn yě. Qì lì zhě, sài tānlù bì quánmén yě. [Pinyin]

  Quit cleverness, swindling, deceit, and confusing the truth. Abandon profit, block the road to greed, and close the doors to power and authority.

Used figuratively in the Book of Han and Dongguan Hanji.

權門

1. powerful family

   • 皆交遊貴戚，趨權門，為名。 [Traditional Chinese poetry, trad.]
     皆交游贵戚，趋权门，为名。 [Traditional Chinese poetry, simp.]

     From: The Book of Han, circa 1^st century CE

     Jiē jiāoyóu guìqī, qū quánmén, wèi míng. [Pinyin]

     All associated with nobilities and ingratiated [themselves] to powerful families, seeking fame.

   • 外附之臣，依託權門，諂諛以求容媚，宜誅之。 [Traditional Chinese poetry, trad.]
     外附之臣，依托权门，谄谀以求容媚，宜诛之。 [Traditional Chinese poetry, simp.]

     From: Dongguan Han Ji, 1^st century CE– 2^nd century CE

     Wàifù zhī chén, yītuō quánmén, chǎnyú yǐ qiú róngmèi, yí zhū zhī. [Pinyin]

     (please add an English translation of this usage example)