كتاب البيوع
11  
Business Transactions
(1c)
Chapter: Earning, and Seeking what is Lawful - Section 3
(1)
باب الكسب وطلب الحلال - الفصل الثالث
Mishkat al-Masabih 2781
‘Abdallah b. Mas'ud reported God's Messenger as saying, “Trying to earn a lawful livelihood is an obligatory duty in addition to the duties which are obligatory.” Baihaqi transmitted it in Shu’ab al-iman.
عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «طَلَبُ كَسْبِ الْحَلَالِ فَرِيضَةٌ بَعْدَ الْفَرِيضَةِ» . رَوَاهُ الْبَيْهَقِيُّ فِي شعب الْإِيمَان
  ضَعِيف   (الألباني) حكم   :
Reference : Mishkat al-Masabih 2781
In-book reference : Book 11, Hadith 23