Footstep

The triliteral root ʿhamza thā rā (أ ث ر) occurs in the Quran 21 times.

(5:46) And We sent on their footsteps (Arab. آثَارِهِمْ, āthārihim) Jesus the son of Mary, authenticating what was present with him of the Torah. We gave him the Injeel, in it is guidance and light, and to authenticate what is present with him of the Torah, and a guidance and lesson for the righteous.