Sunan Ibn Majah
2138
Sahih+3

It was narrated from Miqdam bin Ma'dikarib (Ar- Zubaidi) that the Messenger of Allah (ﷺ) said:"No man earns anything better than that which he earns with his own hands, and what a man spends on himself, his wife, his child and his servant, then it is charity

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi