اَلْعَدَد 18:7

وَأَمَّا أَنْتَ وَبَنُوكَ مَعَكَ فَتَحْفَظُونَ كَهَنُوتَكُمْ مَعَ مَا لِلْمَذْبَحِ وَمَا هُوَ دَاخِلَ ٱلْحِجَابِ، وَتَخْدِمُونَ خِدْمَةً. عَطِيَّةً أَعْطَيْتُ كَهَنُوتَكُمْ. وَٱلْأَجْنَبِيُّ ٱلَّذِي يَقْتَرِبُ يُقْتَلُ».

Therefore thou and thy sons with thee shall keep your priest’s office for every thing of the altar, and within the vail; and ye shall serve: I have given your priest’s office unto you as a service of gift: and the stranger that cometh nigh shall be put to death.