Qutayba bin Sa'id bin Jamil قتيبة بن سعيد بن جميل · Chapters On Witnesses

"O you people False witness is tantamount to Shirk with Allah" Then the Messenger of Allah (s.a.w)recited: So shun the Rijs of the idols, and shun false speech.

"The best of people are my generation, then those who follow them,then those who follow them. Then lying will spread, until a man testifies while his testimony was not requested, and a man will take an oath while an oath was not sought."