Ibn Abd al-Wahhaab said, in a letter that he wrote when he joined al-Ameer Sa’ood ibn ‘Abd al-‘Azeez, when he took over Makkah on Saturday 8 Muharram 1218 AH:
“Our madhhab with regard to the basic principles of religion is the madhhab of Ahl al-Sunnah wa’l-Jamaa’ah.
"Our way is the way of the salaf, and with regard to minor issues our madhhab is that of Imaam Ahmad ibn Hanbal. We do not denounce those who follow any of the four imaams in exclusion to others, because the madhhabs of the others have not been codified.”
Then he said: “Lies are told about us to conceal the truth and confuse the people, so that they will think that we want to undermine the status of our Prophet Muhammad (peace and blessings of Allaah be upon him), and (that we say) that he has no power of intercession and that it is not recommended to visit him (his grave), and that we do not lend any weight to the views of the scholars, and that we denounce all people as kaafirs , and that we forbid sending blessings on the Prophet (peace and blessings of Allaah be upon him), and that we do not respect the rights of Ahl al-Bayt (the members of the Prophet’s houshold).
Our response to all of that is: Glory be to You, this is a grave lie! Whoever attributes anything of this sort to us is telling lies and uttering fabrications against us.”
(‘Ulamaa’ al-Najd Khilaal Sittat Quroon by ‘Abd-Allaah ibn ‘Abd al-Rahmaan ibn Saalih al-Bassaam, 1/51)