Abu Ja'far (may Allah have mercy on him) was with Sayyiduna Jabir (may Allah be pleased with him) when some people asked him about the ritual bath for major ritual impurity. He said: A sa' (of water) is sufficient. A man said: By Allah! This water will not be enough for me, nor for so-and-so. Sayyiduna Jabir (may Allah be pleased with him) said: It was sufficient for one who had more hair than you and who was better than you.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 937