Musnad Ahmad 1235:0

Narrated to us by Abu al-Mughirah, who said: Narrated to us by al-Awza’i, who said: Narrated to us by Makhul, from Abu Tha’labah al-Khushani, who said: The Messenger of Allah (ﷺ) said: "Verily, Allah the Exalted has laid down obligations, so do not neglect them. He has set limits, so do not transgress them. He has forbidden things, so do not violate them. And He has remained silent regarding things—out of mercy for you, not out of forgetfulness—so do not inquire about them."