Al-Baqara (2:248)
وَقَالَ لَهُمۡ نَبِیُّهُمۡ إِنَّ ءَایَةَ مُلۡكِهِۦۤ أَن یَأۡتِیَكُمُ ٱلتَّابُوتُ فِیهِ سَكِینَةࣱ مِّن رَّبِّكُمۡ وَبَقِیَّةࣱ مِّمَّا تَرَكَ ءَالُ مُوسَىٰ وَءَالُ هَـٰرُونَ تَحۡمِلُهُ ٱلۡمَلَـٰۤىِٕكَةُۚ إِنَّ فِی ذَ ٰلِكَ لَـَٔایَةࣰ لَّكُمۡ إِن كُنتُم مُّؤۡمِنِینَ
And their Prophet said unto them: Lo! the token of his kingdom is that there shall come unto you the ark wherein is peace of reassurance from your Lord, and a remnant of that which the house of Moses and the house of Aaron left behind, the angels bearing it. Lo! herein shall be a token for you if (in truth) ye are believers.
— Mohammed Marmaduke William Pickthall
Wa qaala lahum Nabiyyuhum inna Aayata mulkiheee ai yaatiyakumut Taabootu feei sakeenatummir Rabbikum wa baqiyyatummimmaa taraka Aalu Moosa wa Aalu Haaroona tahmiluhul malaaa'ikah; inna fee zaalika la Aayatal lakum in kuntum mu'mineen