Quran 2:248 from Surah Al-Baqara on Divine Marvels.
وَقَالَ لَهُمۡ نَبِيُّهُمۡ إِنَّ ءَايَةَ مُلۡكِهِۦٓ أَن يَأۡتِيَكُمُ ٱلتَّابُوتُ فِيهِ سَكِينَةٞ مِّن رَّبِّكُمۡ وَبَقِيَّةٞ مِّمَّا تَرَكَ ءَالُ مُوسَىٰ وَءَالُ هَٰرُونَ تَحۡمِلُهُ ٱلۡمَلَٰٓئِكَةُۚ إِنَّ فِي ذَٰلِكَ لَأٓيَةٗ لَّكُمۡ إِن كُنتُم مُّؤۡمِنِينَ
English translation: And said to them their Prophet Indeed a sign (of) his kingship (is) that will come to you the ark in it (is) a tranquility from your Lord and a remnant of what (was) left (by the) family (of) Musa and family (of) Harun will carry it the Angels Indeed in that (is) surely a sign for you if you are believers
Transliteration: waqala lahum nabiyyuhum inna ayata mul'kihi an yatiyakumu al-tabutu fihi sakinatun min rabbikum wabaqiyyatun mimma taraka alu musa waalu haruna tahmiluhu al-malaikatu inna fi dhalika laayatan lakum in kuntum mu'minina