Narrated Abdullah ibn Abbas: I was not commanded to build high mosques. Ibn Abbas said: You will certainly adorn them as the Jews and Christians did.
The Prophet Muhammad SAW also taught us that a mosque should be built with simplicity so that it can serve its purpose without any distractions or unnecessary decorations which could take away from its spiritual atmosphere. He also warned against making a showy display when constructing a mosque as this could lead to pride among those who build it or those who visit it. Therefore, this hadith serves as an important reminder for us to stay humble in all aspects of life including when constructing places for worshiping Allah SWT.