Al-Baqarah 2:248

Waqala lahum nabiyyuhum inna ayatamulkihi an ya/tiyakumu attabootu feehi sakeenatunmin rabbikum wabaqiyyatun mimma taraka alu moosawaalu haroona tahmiluhu almala-ikatuinna fee thalika laayatan lakum in kuntum mu/mineen

And their prophet said to them, "Indeed, a sign of his kingship is that the chest will come to you in which is assurance from your Lord and a remnant of what the family of Moses and the family of Aaron had left, carried by the angels. Indeed in that is a sign for you, if you are believers."

Their prophet said to them: “The sign of his kingship is that the Ark shall come to you, carried by the angels, having therein tranquillity from your Lord, and the remains of what the House of Mūsā and the House of Hārūn (Aaron) had left. Surely, in it there is a sign for you, if you are believers.”