Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Safwan bin Amr al-Saksaki that when Hazrat Umar bin Abdul Aziz assigned the responsibility to Walid bin Hisham Qureshi and Amr bin Qais Sukuni to send a group for the summer campaign, he also provided them with antidote from the treasury and instructed them that whoever comes to you asking for the antidote, you should give him this antidote.