Shaikhul-Islam Ibn Taymiyyah quotes in al-Istiqaamah (pp.85-86):
That when Abdul-Qaadir al-Jeelaanee was asked:
`Has there ever been one who was a Walee of Allaah who was upon other than the Aqeedah of Ahmad bin Hanbal?`
He replied: `That has not occurred and will not occur.`
__________________ The example of those who take allies other than Allah is like that of the spider who takes a home. And indeed, the weakest of homes is the home of the spider, if they only knew. Indeed, Allah knows whatever thing they call upon other than Him. And He is the Exalted in Might, the Wise. And these examples We present to the people, but none will understand them except those of knowledge.
[al-'Ankaboot; 41-44]