68:10
وَلَا تُطِعْ كُلَّ حَلَّافٍ مَّهِينٍ
walā tuṭiʿ kulla ḥallāfin mahīnin
do not yield to any contemptible swearer,
And (O Muhammad صلى الله عليه وسلم) obey you not everyone Hallaf Mahîn (the one who swears much and is a liar or is worthless). [Tafsir At-Tabari]