ויעלו בנגב ויבוא עד חברון
From the Torah’s use of the singular va’yavo, and he came, Chazal (Sotah 34b) derive that Calev alone left the group, so that he could visit the graves of the Patriarchs to pray that they intercede on his behalf. So great was the ability of the meraglim to influence that Calev feared being influenced by them. Yehoshua had no reason to leave, since Moshe Rabbeinu had already prayed for him before they had all left the camp. In his Iyun Yaakov commentary to the Talmud, Horav Yaakov Reisher, zl, asks why Calev prayed at the graves of the Patriarchs. Chazal…