One who denies Mahdi is a Disbeliever – Holy Prophet of Islam (pbuh)

Holy Prophet (pbuh) said, One who denies the Dajjal has disbelieved, and one who denies the Mahdi, certainly he has disbelieved.

 عن النبي صلي الله عليه وآله وسلم من كذب بالدجال فقد كفر ومن كذب بالمهدي فقد كفر

Ref: Al Fatawil Hadisih by Shahbuddin Ibne Hajar Al Haitmish Shafai.

Holy Prophet (pbuh) said, One who denies the Dajjal has disbelieved, and one who denies the Mahdi, certainly he has disbelieved.

 ورد أن صلي الله عليه وسلم قال من كذب بالدجال فقد كفر ومن كذب بالمهدي فقد كفر

Ref: Al Qawlul MukhtasarFi Alamaat il Mahdi Muntazar by Abul Abbas Ahmad ibne Mohd Ibne Hajar Makki.