Deuteronomy 21:1

כִּי יִמָּצֵא חָלָל בָּאֲדָמָה אֲשֶׁר יְהוָה אֱלֹהֶיךָ נֹתֵן לְךָ לְרִשְׁתָּהּ נֹפֵל בַּשָּׂדֶה לֹא נוֹדַע מִי הִכָּהוּ

King James Version (KJV)

If in the land that the LORD your God is giving you to possess someone is found slain, lying in the open country, and it is not known who killed him,

Modern English

If someone is found slain in the land which Yahweh your God gives you to possess, lying in the field, and it isn’t known who has struck him;