民数記 25:4

קח את כל ראשי העם TAKE ALL THE HEADS OF THE PEOPLE, to judge those who worshipped Peor (Sanhedrin 35a), והוקע אותם AND HANG THEM — those who worshipped it (not the heads of the people). והוקע — This is “hanging”, just as we find in the case of Saul’s sons, (II Samuel XXL 6) “And we will kill them by הוקעה unto the Lord”, and there (II Samuel vv. 12—13) hanging is distinctly mentioned (Sanhedrin 34b). It is true that idolatry (the sin committed here) is punishable by stoning, but all who were stoned were also hanged (Sanhedrin 45b). נגד השמש AGAINST THE SUN — i.e., in the sight of everyone. A Midrashic statement is: the sun made known who were the sinners, for the cloud rolled itself up from in front of him (the sinner) so that the sun shone upon him (Midrash Tanchuma, Balak 19).

וַיֹּ֨אמֶר יְהֹוָ֜ה אֶל־מֹשֶׁ֗ה קַ֚ח אֶת־כׇּל־רָאשֵׁ֣י הָעָ֔ם וְהוֹקַ֥ע אוֹתָ֛ם לַיהֹוָ֖ה נֶ֣גֶד הַשָּׁ֑מֶשׁ וְיָשֹׁ֛ב חֲר֥וֹן אַף־יְהֹוָ֖ה מִיִּשְׂרָאֵֽל׃

And the Lord said to Moshe, Take all the chiefs of the people, and hang them up before the Lord against the sun, that the burning anger of the Lord may be turned away from Yisra᾽el.