All praise is for Allaah and may peace and blessings be upon His Messenger and his family and his Companions…
To proceed: if an aahaad hadeeth is authentically established from the Prophet sal Allaahu alaiyhi wa sallam then it constitutes a proof for that matter which it indicates, in belief and in action, according to the consensus of the Ahl us Sunnah.
And whoever rejects the use of aahaad Ahadeeth as proof after the hujjah (proof) has been established upon him, then he is a kaafir (disbeliever). And refer to the ‘Kitaab us sawaa’iq’ of Ibn ul Qayyim or to its summary by al Mawsilee.
And with Allaah is the tawfeeq. And may peace and blessings be upon our Prophet, Muhammad and upon his family and Companions.