It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Messenger of Allah (peace and blessings be upon him) said: "Whoever gives a fasting person something to break his fast with will have a reward equal to that fasting person's reward, and the fasting person's reward will not be diminished at all."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from al-Zuhri except al-Hakam, and no one narrated it from al-Hakam except Isa; Kathir bin Hisham is alone in narrating it."
In the Dar al-Haramayn edition it appears like this (Musa bin Hazim), and probably the correct form is (Khazim).
Hadith Referenceالمعجم الأوسط / باب الميم / 8438
Hadith Takhrij«أخرجه الطبراني فى «الأوسط» برقم: 7136»