According to Jewish tradition, the ashes of a perfectly red heifer cow are needed for the ritual purification that would allow a third temple to be built in Jerusalem. That temple, say radical Jewish groups, must be constructed on the raised plateau in Jerusalem's Old City known as the Temple Mount, where Al-Aqsa Mosque and the Dome of the Rock shrine stand today.

Some believe this will herald the arrival of the messiah and possibly even the end of the world.

"Temple worshipers are now practicing the mitzvah [religious duty] of a red cow in front of the Temple Mount, which will enable the return of purity and the observance of all the temple mitzvahs," posted journalist Yinon Magal on Tuesday, along with a picture of activists from the Temple Institute.

In 2022, five red heifers arrived in Israel from a Texas ranch and are now kept in an archaeological park next to Shilo, an illegal Israeli settlement near the Palestinian city of Nablus.

The Temple Institute imported the heifers for the eventual purpose of using them in a ritual after years of searching for blemish-free cows, without a stray white or black hair.

Their eventual slaughter on the Mount of Olives will - according to advocates - allow Jewish people to be purified so they can perform rites and worship on the site of Al-Aqsa Mosque.

Research by a professor at Bar Ilan University estimated that the ashes of one cow could be made into enough cleansing water for 660 billion purifications. The cow being practiced upon in Magal's image (below) does not appear to be one of the five red heifers from Shilo.

The traditional site of the ritual, the Mount of Olives, is seen in the background on the other side of Al-Aqsa Mosque, suggesting the practice run was performed within the Old City.