This hadeeth comes under the following chapter: THE REWARD FOR AN HONEST TRUSTEE AND FOR THE WOMAN AS SHE GIVES CHARITY FROM THE HOUSEHOLD OF HER HUSBAND EITHER WITH HIS EXPLICIT SANCTION OR AS IT IS CUSTOMARY
Umair, the freed slave of Abi'l-Lahm reported: 1 was the slave (of Abi'l-Lahm). I asked the Messenger of Allaah (sallAllaahu alayhi wa sallam) if I could give some charity out of my master's wealth. He said: Yes, and the reward is half and half between you two.