Al-Matalib al-'Aliyah 3662 — Surah Ta Ha

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) (concerning the calf) that he said: "Whenever that calf made its peculiar sound, those people (the Children of Israel) would fall down in prostration, and when it fell silent, they would raise their heads (from prostration)."
Ahmad bin Mani' transmitted this report in his Musnad. In its chain, the narrator Farqad bin Ya'qub al-Sabakhi is da'if (weak). Moreover, it is a saying of Sayyiduna Ibn Abbas (may Allah be pleased with them both) (a mawquf report), which apparently is taken from the accounts of earlier scriptures (Isra'iliyyat).