مَنْ أَرَادَ أَنْ يَتَكَلَّمَ بِعِلْمٍ فَلْيَنْظُرْ: إِنْ كَانَ لِلَّهِ تَكَلَّمَ، وَإِلَّا فَلْيَسْكُتْ.

Whoever wishes to speak with knowledge, let him consider: if it is for Allah, then let him speak; otherwise, let him remain silent.