It is narrated from Hazrat Tariq bin Shihab, he says that a man had boils on his neck, so he treated them with camel urine and peelu (Salvadora persica). (In such a way that) the camel urine and peelu were boiled together. Then people started asking this patient about the treatment. The man refused to tell. Then that man met Hazrat Abdullah bin Mas'ud (may Allah be pleased with him), so he said, "Tell the people about this treatment."