The Sahabah (may Allah be pleased with them) were keen to learn from the Prophet (blessings and peace of Allah be upon him) all religious matters – especially those that are done repeatedly every day, such as wudu’, ghusl and prayer – so that they would know these things and convey them to those who came after them. In this hadith, Abu Ja‘far Muhammad ibn ‘Ali al-Baqir said: Jabir ibn ‘Abdillah (may Allah be pleased with him) said to me: Your cousin came to me – meaning al-Hasan ibn Muhammad ibn al-Hanafiyyah; this Muhammad was the son of ‘Ali ibn Abi Talib (may Allah be pleased with him). Al-Hasan asked Jabir how to do ghusl to cleanse oneself from janabah. The word janabah refers to anyone who emits maniy (semen) as the result of a wet dream or intercourse; it is so called because he must avoid (ijtinab) prayer and other acts of worship until he has purified himself. Jabir (may Allah be pleased with him) told him that the Prophet (blessings and peace of Allah be upon him) used to take three handfuls of water and pour it over his head, then he would pour water on the rest of his body. Al-Hasan said to Jabir: I am a man who has a lot of hair, indicating that this amount of water was too little to wash his head, and would not be enough for all of his hair, using that as an excuse to use more water. But Jabir (may Allah be pleased with him) said: The Prophet (blessings and peace of Allah be upon him) had more hair than you, meaning that he used to do that with this amount of water, even though his hair was thick. This highlights that no one has any excuse for being extravagant in his use of water on the grounds that he wants to make it reach all of his hair [or body]. This hadith urges us to be economical in using water. It highlights how long the hair of the Prophet (blessings and peace of Allah be upon him) was. It also highlights the eagerness of the Tabi‘in to learn from the Sahabah (may Allah be pleased with them)..