Al-Matalib al-'Aliyah 3606 — Surah al-A'raf

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: "Indeed, the seventy men whom Sayyiduna Musa (peace be upon him) chose from his people were seized by the terrible earthquake only because they did not forbid their people from worshipping the calf, even though they themselves were not pleased with it (that act of shirk)."
The chain of this report is hasan (good). Ibn Abi Umar narrated it in his Musnad, and supporting evidence for it exists in other reports of tafsir.