'Thorn bush' in the Bible

because every tree is known by its own fruit. People don't gather figs from thorny plants or pick grapes from a thorn bush.

“After forty years had passed, an angel appeared to him in the wilderness of Mount Sinai, in the flame of a burning thorn bush.

“This Moses whom they disowned, saying, ‘Who made you a ruler and a judge?’ is the one whom God sent to be both a ruler and a deliverer with the help of the angel who appeared to him in the thorn bush.