וַיֵּ֥רֶד מֹשֶׁ֖ה אֶל־הָעָ֑ם וַיֹּ֖אמֶר אֲלֵהֶֽם׃ (ס)
האָט משה אַראָפּגענידערט צום פֿאָלק, און זײ געזאָגט.
Chizkuni
.ויאמר אליהם, “he (Moses) said to them,” that only he and Aaron had been given permission to proceed further.
Sforno
ויאמר אלהם, he conveyed G’d’s warning to them as well as the penalty for violating G’d’s command. (verse 21)