The gold-coloured necklace that Meta CEO Mark Zuckerberg has been spotted wearing has 'Mi Shebeirach', a Jewish prayer for "health and courage", engraved on it, Zuckerberg said in a Bloomberg interview. "I've sung [the prayer] to [my daughters] basically every night of their lives," he said. Zuckerberg had earlier said the necklace had sentimental values attached to it.