Concise Bible Dictionary:
The thorn-bush in which God was pleased to reveal Himself to Moses when He gave him his commission (Ex. 3:2-4). God’s presence made it holy ground, and one of His characteristics is brought out by the bush burning, without being consumed; for “our God is a consuming fire,” burning up the dross, without destruction. Moses did not forget the bush: when he blessed the twelve tribes just before he died he spoke of the “good will of him who dwelt in the bush” (Deut. 33:16): and it is three times mentioned in the New Testament (Mark 12:26; Luke 20:37; Acts 7:30-35).