أَخْبَارِ ٱلْأَيَّامِ ٱلْأَوَّلُ 9:33

فَهَؤُلَاءِ هُمُ ٱلْمُغَنُّونَ رُؤُوسُ آبَاءِ ٱللَّاوِيِّينَ فِي ٱلْمَخَادِعِ، وَهُمْ مُعْفَوْنَ، لِأَنَّهُ نَهَارًا وَلَيْلًا عَلَيْهِمِ ٱلْعَمَلُ.

And these are the singers, chief of the fathers of the Levites, who remaining in the chambers were free: for they were employed in that work day and night.