Calling the dead and asking them is shirk! This is exactly what the idol
worshippers said and Allah called them disbelievers:
UNQUESTIONABLY, FOR ALLAH IS THE PURE RELIGION. AND THOSE WHO TAKE
PROTECTORS BESIDES HIM [SAY], “WE ONLY WORSHIP THEM THAT THEY MAY BRING
US NEARER TO ALLAH IN POSITION.” INDEED, ALLAH WILL JUDGE BETWEEN THEM
CONCERNING THAT OVER WHICH THEY DIFFER. INDEED, ALLAH DOES NOT GUIDE HE
WHO IS A LIAR AND [CONFIRMED] DISBELIEVER. 39:3