Imam Ahmad has narrated from Harith Al-Ash'ari, who said that the Prophet - Peace be upon him - said: "Allah commanded Yahya (peace be upon him) to fulfill five duties and to command the Israelites to carry them out as well. But Yahya held up for a while, so he was told by Jesus (peace be upon him): 'You have been commanded to act according to five teachings, and to command them to the Israelites. So would you tell them yourselves, or shall i convey it to them?' Yahya said: 'My brother! i fear that if you do it, i may be punished or be swallowed up by the earth.' Then Yahya gathered the Israelites in the Masjid (in Jerusalem)...