Hadith 1

Bulugh al-Maram

Book 7: Business Transactions
عَنْ رِفَاعَةَ بْنِ رَافِعٍ ‏- رضى الله عنه ‏- أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-سُئِلَ: أَيُّ اَلْكَسْبِ أَطْيَبُ? قَالَ: { عَمَلُ اَلرَّجُلِ بِيَدِهِ, وَكُلُّ بَيْعٍ مَبْرُورٍ } رَوَاهُ اَلْبَزَّارُ، وَصَحَّحَهُ اَلْحَاكِمُ.‏ 1‏ .‏
Rifa'a bin Rafi' (RA):

The Prophet (ﷺ) was asked, 'What type of earning is best?' He replied, "A man's work with his hand and every transaction which is free from cheating or deception." [Reported by al-Bazzar; al-Hakim graded it Sahih (authentic)].