Numbers 19:3

19:3 You must give it to Eleazar the priest so that he can take it outside the camp, and it must be slaughtered before him. ¹ 

Numbers 21:11

21:11 Then they traveled on from Oboth and camped at Iye Abarim, ²  in the wilderness that is before Moab, on the eastern side. ³ 

[19:3]  ¹ tc The clause is a little ambiguous. It reads “and he shall slaughter it before him.” It sounds as if someone else will kill the heifer in the priest’s presence. Since no one is named as the subject, it may be translated as a passive. Some commentators simply interpret that Eleazar was to kill the animal personally, but that is a little forced for “before him.” The Greek text gives a third person plural sense to the verb; the Vulgate follows that reading.

[21:11]  ² sn These places are uncertain. Oboth may be some 15 miles (25 km) from the south end of the Dead Sea at a place called ‘Ain el-Weiba. Iye Abarim may be the modern Mahay at the southeastern corner of Moab. See J. Simons, The Geographical and Topographical Texts of the Old Testament.

[21:11]  ³ tn Heb “the rising of the sun.”