اَلْعَدَد 19:9

وَيَجْمَعُ رَجُلٌ طَاهِرٌ رَمَادَ ٱلْبَقَرَةِ وَيَضَعُهُ خَارِجَ ٱلْمَحَلَّةِ فِي مَكَانٍ طَاهِرٍ، فَتَكُونُ لِجَمَاعَةِ بَنِي إِسْرَائِيلَ فِي حِفْظٍ، مَاءَ نَجَاسَةٍ. إِنَّهَا ذَبِيحَةُ خَطِيَّةٍ.

And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin.