Numbers 11:28

כלאם — (This is taken as the equivalent of כַּלֵּם, “destroy them”, “make an end of them”; cf. Rashi on Exodus 17:9) — He meant: cast upon them the responsibility for public affairs and they will of themselves soon come to an end (through the worry and anxiety this entails). — Another explanation is: that the word means put them into prison (כלא). He said this because they were prophesying, “Moses will die and Joshua will bring Israel into the Land” (cf. Sifrei Bamidbar 96; Sanhedrin 17a).

וַיַּ֜עַן יְהוֹשֻׁ֣עַ בִּן־נ֗וּן מְשָׁרֵ֥ת מֹשֶׁ֛ה מִבְּחֻרָ֖יו וַיֹּאמַ֑ר אֲדֹנִ֥י מֹשֶׁ֖ה כְּלָאֵֽם׃

And Yehoshua the son of Nun, the servant of Moshe from his youth, answered and said, My lord Moshe restrain them.