With more than 1,300 civilians have been killed in Russia’s unprovoked invasion of Ukraine, evangelist Franklin Graham urges Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy to agree on a ceasefire during the 10 days of Easter observances. Graham, who heads the international humanitarian organization Samaritan’s Purse and the Billy Graham Evangelistic Association, wrote on Facebook on Thursday, “I have written to … Putin and to … Zelenskyy asking for a ceasefire from April 15-24.”

Graham, who recently visited Ukraine, wrote, “I shared with them that I will be calling on churches in Ukraine, Russia, and around the globe to join together in prayer during those 10 days. May we humbly unite before the King of kings and the Lord of lords, the Prince of Peace, to ask for His help and mercy.”

Graham added that he hopes that if they can agree to a 10-day ceasefire, then “maybe they can stop fighting for two weeks.” “If they stop for two weeks, maybe they can stop for a month,” he claimed. “If they stop for a month, maybe they can stop for good. You’ve got to start somewhere.”

Since Russia began its invasion on February 24, at least 1,325 civilians have been killed and 2,017 injured as of a Saturday update from the United Nations. Among those killed are 120 children. Since the invasion began, more than 10 million people in Ukraine have been forced to flee their homes.

Graham, the son of legendary evangelist Billy Graham, said the deadly conflict is “a manufactured disaster, a historic humanitarian crisis. He believes “God is the only solution.” In an interview with The Christian Post last month, Graham discussed Samaritan’s Purse’s efforts to minister to help Ukrainians fleeing the regions of their country targeted by Russia for western Ukraine.

The organization has established a field hospital in western Ukraine. The North Carolina-based charity operates medical clinics and distributes relief items through 3,000 church partners in Ukraine and Moldova. The charity has made five airlifts, delivering more than 185 tons of supplies since March 4.

Among the medical clinics, Samaritan’s Purse has established a 24-hour clinic at a train station in Lviv and another at a bus station in the city. A third clinic is located in Chernivtsi in southwest Ukraine.

Samaritan’s Purse has over 150 staff members in the region and treats over 100 patients per day. The organization saw more than 2,400 patients across all of its medical sites last week. The organization plans to set up a second emergency field hospital near the front lines of the conflict.

In Russia, police have arrested thousands of protesters who have demonstrated against the invasion amid widespread censorship of social media and news outlets. More than 280 priests and deacons of the Russian Orthodox Church and over 400 ministers of Evangelical churches in Russia have called for reconciliation and an immediate end to Russia’s ongoing invasion of Ukraine.

In his Facebook post, Graham urged Christians worldwide to “pray for God to work in the hearts of leaders involved and to intervene and bring peace and an end to the conflict.”