Hazrat Mahdi (as) will resemble the children of Israel in appearance

Hazrat Mahdi's (as) stature and posture resemble those of the People of Israel.(Ibn Hajar al-Haythami, Al-Qawl al-Mukhtasar fi `Alamat al-Mahdi al-Muntadhar, pp. 36-29.)

His body is an Israelite one. (Al-Muttaqi al-Hindi, Al-Burhan fi Alamat al-Mahdi Akhir az-Zaman, p. 24) 

Hazrat Mahdi (as) is like one of the People of Israel.

[His demeanor resembles theirs, it is majestic and wise.]

(Al-Muttaqi al-Hindi, Al-Burhan fi Alamat al-Mahdi Akhir az-Zaman, p. 23-30)  

Abdullah bin Harith says: HAZRAT MAHDI (AS) will rise at the age of forty and will RESEMBLE THE CHILDREN OF ISRAEL (in terms of appearance). (Al-Hawi lil-fatawi, vol. 2, p. 135)