“Once I was with abu ‘Abd Allah (a.s.), and my father was asking him (the Imam) questions about milk from a dead animal, eggs from dead chickens and rennet from dead animals. He (the Imam) said, ‘All of these things are clean.’ He (the narrator) has said, ‘I then asked him (the Imam) about the hairs of pigs from which ropes are made and are used to draw water from wells for drinking or wudu.’ He (the Imam) said, ‘It is not unlawful.’ Ali ibn ‘Uqbah and Ali ibn al-Husayn ibn Ribat have added saying, ‘Hairs and wool, all of it is clean.’ In the Hadith of Safwan from al-Husayn ibn Zurarah from abu ‘Abd Allah (a.s.), it says that hairs, wool, fur and feathers and all growing things (on the body of animals which is slaughtered properly) but are not dead. He (the narrator) has said, ‘I then asked about the egg that comes from a dead chicken. He (the Imam) said, ‘You can eat it.’”