No, He didn't. I thought we went through this already. Maybe it was with someone else. Anyway, Isaiah 51:1 is calling the Lord the Rock. In verse 2 it goes on to say "and unto Abraham".
Hearken to me, you who pursue deliverance,
you who seek the Lord;
look to the rock from which you were hewn,
and to the quarry from which you were digged.
2 Look to Abraham your father
and to Sarah who bore you;
for when he was but one I called him,
and I blessed him and made him many.
"Look to the rock from which you were hewn . . look to Abraham your father."
The "look to" passages are put in parallel, showing they are speaking to the same thing, which is Abraham. The repetition is rhetorical.
"Abraham" is the "rock" from which the Jews were hewn and became many. His descendants are, so to speak, "chips off the ol' block."
This is really quite obviously unless one is diligently trying not to see it.