סָ֣רוּ מַהֵ֗ר מִן־הַדֶּ֙רֶךְ֙ אֲשֶׁ֣ר צִוִּיתִ֔ם עָשׂ֣וּ לָהֶ֔ם עֵ֖גֶל מַסֵּכָ֑ה וַיִּשְׁתַּֽחֲווּ־לוֹ֙ וַיִּזְבְּחוּ־ל֔וֹ וַיֹּ֣אמְר֔וּ אֵ֤לֶּה אֱלֹהֶ֙יךָ֙ יִשְׂרָאֵ֔ל אֲשֶׁ֥ר הֶֽעֱל֖וּךָ מֵאֶ֥רֶץ מִצְרָֽיִם׃
Mabilis silang lumihis mula sa daan na iniutos Ko sa kanila; gumawa sila para sa kanilang sarili ng isang binubong guya, yumukod sila rito at naghain dito, at sinabi nila: “Ito ang iyong mga diyos, O Israel, na nag-ahon sa iyo mula sa lupain ng Egipto.”
Sforno
סרו מהר, they have strayed very quickly, etc. I have not even been able to complete the gift of the Torah I had wanted to give to you. A reference to “the Torah and the Mitzvah” in Exodus 24,12.
Or HaChaim
סרו מהר מן הדרך, "they have quickly departed from the path, etc." The meaning of these words is clear in view of the statement in Chulin 4 that if someone acknowledges even passively that there is some substance to idolatry he is considered as having denied the entire Torah. This is why G'd said: "which I have commanded them," i.e. "all that I have commanded them."
Rabbeinu Bahya
סרו מהר, “they have quickly departed, etc.” This term 'quickly' was most appropriate seeing that the people had apparently forgotten the miracles they had seen at the revelation only forty days ago and had committed idolatry at a time when the Shechinah was still present amongst them on Mount Sinai. Solomon paraphrased this when he said (Song of Songs 1,12 as interpreted in Shabbat 88) ”while the king was still at the table (Sinai), my nard gave forth its (foul) smell.” The words used by the Torah here have also been paraphrased by David in Psalms 106,13: “but they soon forgot His deeds; they would not wait to learn His plan.” The word עצתו, “His plan,” in that psalm refers to the Torah which Moses would bring with him on the morrow. Cf. Isaiah 25 for a similar usage of the word עצה.