You can do that before or as you enter the masjid.

Kindly refer to the following link(s):

https://www.youtube.com/watch?v=Vx-cg8oHe9g

When should we recite the dua of entering masjid, before putting the foot inside the masjid or before entering the masjid and vice versa?

Prayer | April 25, 2017 4:46 am
Previous

Is it permissible to skip prayer due to illness or sickness? Ex:- because of fever.
Next

sheikh if a hair or some hair falls bwtween the place we go to sujood and forehead.will the prayer be ok.