Commentary for II Samuel 6:7
וַיִּֽחַר־אַ֤ף יְהוָה֙ בְּעֻזָּ֔ה וַיַּכֵּ֥הוּ שָׁ֛ם הָאֱלֹהִ֖ים עַל־הַשַּׁ֑ל וַיָּ֣מָת שָׁ֔ם עִ֖ם אֲר֥וֹן הָאֱלֹהִֽים׃
And the anger of the LORD was kindled against Uzzah; and God smote him there for his error; and there he died by the ark of God.
Rashi on II Samuel
Because of his mistake. Because of his mistake, he should have expounded a fortiori [as follows:] the Ark carried its own porters in the Yardein,7When Bnei Yisroel crossed the Yardein into the land of Yisroel as stated in Yehoshua 4:11 and explained in Sotah, ibid. isn't it all the more so [that it is able to carry] itself.
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