On the way to the Akeida, the Satan tries to dissuade Avrohom and Yitzchok. Satan fails with Avrohom but succeeds with Yitzchok. Until Avrohom explains to Yitzchok the true depth of the significance of the test and accomplishment of the Akeida.

Sources

Sefer Shivchei Ha'Ari

Parshas Vayera Perek 22 Pessukim 6 - 13

Commentaries of Rashi On Pessukim 6, 8 and 13

Midrash Rabba Parsha 56 Chapters 3 and 4

Zecharya Perek 3 Pessukim 1 and 2

Commentary of Rashi on both Pessukim

Sefer Gilgulei Neshamos R' Menachem Azarya M'Panu Chapter 45

Likkutei Sichos of the Lubavitcher Rebbe Volume 30 Pages 76 - 81

See Footnote 29 0f the Sicha