2. Al-Baqara (The Cow)

Surah: 2   Aya: 224

224. Wala tajAAaloo Allaha AAurdatan li-aymanikum an tabarroo watattaqoo watuslihoo bayna alnnasi waAllahu sameeAAun AAaleemun
  

  Translation

224. And make not Allâh's (Name) an excuse in your oaths against your doing good and acting piously, and making peace among mankind. And Allâh is All-Hearer, All-Knower (i.e. do not swear much and if you have sworn against doing something good then give an expiation for the oath and do good).