Ahmad ibn Muhammad narrated from Muhammad ibn Yahya, from Ghiyath, from Imam Ja’far Al Sadiq عليه السلام, from his father Imam Al Baqir عليه السلام.
Imam عليه السلام said: "There is no harm in the blood of fleas and bedbugs, or the urine of bats."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 281
