Tafsir of Ta-Ha 20:88

فَأَخْرَ‌جَ لَهُمْ عِجْلًا جَسَدًا لَّهُ خُوَارٌ‌ (So he brought forth for them a calf, a body with a lowing sound. - 20:88) Some Commentators maintain that it was only a body without life and that the sound was produced by a special contrivance. But the majority of commentators believe that the calf in fact possessed signs of life.

فَقَالُوا هَـٰذَا إِلَـٰهُكُمْ وَإِلَـٰهُ مُوسَىٰ فَنَسِيَ (Then they said, |"This is your god and the god of Musa, and he erred.|" - 20:88) Having carved a calf which could also produce a sound, Samiri and his friends said to the Bani Isra'il|", |"Here is your god and the god of Musa. It seems Musa (علیہ السلام) has forgotten, that is why he has gone elsewhere in search of god|".