Can you confirm the source of this Hadith?
خير الكسب كسب يد العامل إذا نصح
Imam Ahmad (rahimahullah) has recorded this Hadith on the authority of Sayyiduna Abu Hurayrah (radiyallahu ‘anhu). ‘Allamah Mundhiri and ‘Allamah Haythami (rahimahumallah) have declared the narrators reliable (thiqat).
(Musnad Ahmad, vol. 2 pg. 334. Refer: Targhib, vol. 1 pg. 560 and Majma’uz Zawaid, vol. 4 pg. 61 and pg. 98)
The best of earning, is the earnings of that worker who well wishes [i.e. Is honest, upright, does his work thoroughly and correctly].
(Refer: Faydul Qadir, Hadith: 4027 and At Taysir of ‘Allamah Munawi, vol. 1 pg. 527)
Also see here.
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala
Approved by: Moulana Muhammad Abasoomar