Tech entrepreneur Elon Musk, on a visit to Israel after being assailed for an anti-Jewish post on his social media site X, received a symbolic dog tag from the father of an Israeli taken captive by Hamas in Gaza and promised to wear it until all the hostages were free, Reuters reports.

“Our hearts are hostage in Gaza,” read the metal tag he received from Malki Shem-Tov, the father of hostage Omer Shem-Tov, in a video of Musk’s visit issued on Monday by the office of Israeli President Isaac Herzog.

Musk placed it around his neck. Later, he wrote on X: “I will wear it every day until your loved ones are released.”