Talmud for Sheviit 7:5
לוּלְבֵי זְרָדִים וְהֶחָרוּבִין, יֵשׁ לָהֶם שְׁבִיעִית וְלִדְמֵיהֶן שְׁבִיעִית, יֵשׁ לָהֶן בִּעוּר וְלִדְמֵיהֶן בִּעוּר. לוּלְבֵי הָאֵלָה וְהַבָּטְנָה וְהָאֲטָדִין, יֵשׁ לָהֶם שְׁבִיעִית, וְלִדְמֵיהֶן שְׁבִיעִית, אֵין לָהֶם בִּעוּר וְלֹא לִדְמֵיהֶן בִּעוּר. אֲבָל לֶעָלִין יֵשׁ בִּעוּר, מִפְּנֵי שֶׁנּוֹשְׁרִין מֵאֲבִיהֶן:
Shoots of hawthorn and carobs, [the laws of] the Sabbatical year apply to them and [the laws of] the Sabbatical year apply to their money [exchanged for them], [the laws of] <i>Bi'ur</i> apply to them and [the laws of] <i>Bi'ur</i> apply to their money [exchanged for them]. Shoots of the terebinth tree or of the pistachio tree, or thorn bushes, [the laws of] the Sabbatical year apply to them and [the laws of] the Sabbatical apply to their money, but [the laws of] <i>Bi'ur</i> do not apply to them and [the laws of] <i>Bi'ur</i> do not apply to their money. But to the leaves [of these trees], [the laws of] <i>Bi'ur</i> apply, since they fall from their parents.