“I once asked abu ‘Abd Allah (a.s.), about a jar in which a beetle is found dead. He (the Imam) said, ‘Throw it away then use the water for Wudu’; but if it is a scorpion, then throw the water away and use some other water for Wudu’.’ I then asked him (the Imam) about a man who has two water containers of which he knows one is unclean but does not know exactly which one and he is not able to find other water. He (the Imam) said, ‘He must throw away the water in both containers and take a Tayammum instead of Wudu’.’”