Israel’s Ashkenazi Chief Rabbi David Lau on Thursday called for Shabbat to be extended by 20 minutes in response to the expected ‘desecration’ of the Jewish holy day of rest by the Eurovision song contest.

“Due to the great desecration that will take place on the upcoming Sabbath because of the Eurovision song contest, I ask each and every person to refrain from doing work 10 minutes before lighting candles [to mark the start of the Sabbath] and ten minutes after the end of the Sabbath,” Lau said in a lecture in the central city of Modiin.

“We will extend the sanctity of Shabbat and add from the regular to the holy,” he said. “This desecration is taking place before the eyes of the world.”

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This year’s competition is being held in Tel Aviv, and while the finals will not begin until after the Sabbath ends at nightfall on Saturday, rehearsals and production preparations are expected to take place earlier in the day.

Ultra-Orthodox Jews strictly respect religious law prohibiting work on the Sabbath, the weekly day of rest from sundown Friday until nightfall Saturday.

Leading ultra-Orthodox rabbis in Israel called on Wednesday for prayer in response to the competition taking place on the Sabbath.

Eurovision organizers are set “to desecrate our holy and glorious Sabbath publicly and glaringly, God preserve us,” Rabbi Chaim Kanievsky said in a handwritten missive endorsed by another senior religious leader, Rabbi Gershon Edelstein.

“They are also forcing many Sabbath-observant Jews to work on Saturday, and we can’t foil their scheme, and this (desecration) is a danger to our presence here in the Holy Land,” the 91-year-old spiritual leader said in the letter circulating on religious media.

“We must call out and intone and beg God to protect us,” Kanievsky said, calling on followers to convene in synagogues and religious colleges at midnight on Friday “for prayers, saying atonements and asking for mercy.”

On Tuesday, Prime Minister Benjamin Netanyahu assured the leaders of ultra-Orthodox political parties that Eurovision was an international event “not controlled by the government.”

“The Israeli government does not seek to desecrate the Sabbath, and most of the participants in the event are from abroad and not Jewish,” Netanyahu wrote in a letter to them.

Netanyahu is currently in negotiations, including with ultra-Orthodox parties, to form a new governing coalition following a general election last month.

He is facing a May 29 deadline to form a new government.

The Sabbath was said to be one of the reasons Eurovision organizers and Israeli hosts decided against holding the event in the religiously conservative city of Jerusalem.