תּלמוד אויף דברים 5:26

R. Yehoshua ben Levi said Israel made the (golden) calf only to provide an opening for those who seek to return (ba'alei t'shuvah) as it is written: 'Would that it were possible that these feelings would stay with them and they would revere me forever...'

[As] Rav Yoseif said: "From where do I say it [this principle of voting]? As it is written, 'Go, say to them: return to your tents' (Deuteronomy 5:30); and it says, 'With the sound of the horn, then you may ascend the mountain' (Exodus 19:13).

What [did he mean by] "and it says"? [I.e. why provide two verses, why wasn't one sufficient?] This is what he [meant to] say: "Since it is written 'Be prepared – for three days, do not go near a woman' (Exodus 19:15), why did it [need to say] 'Go, say to them: "Return to your tents"' (Deuteronomy 5:30)? Learn from this: Anything which is [prohibited] by a vote [of the Sages] needs another vote to permit it.