All the praises for Allah, who has power over all things and there is in reality no power, and no strength, no influence to cause benefit or death to men except through HIM (swt).
In many Muslim countries around the world people build Masjids on the graves of pious people, these are sometimes called “Dargah” or “Mazar” etc. And people go to those places and ask the dead person to give them a child or whatever they need. Now asking anyone but Allah (Subhana Wa Ta’ala) for anything is Shirk. Here we want to clear up that from the Qur’an and very clear Sahih Hadith that we are NOT supposed to build structures or Masjids on the graves of pious people or anyone else.
Bismillahir Rahmanir Raheem carries great significance in the holy Qur’an and the Sunnah, and the Muslims are ordered not to begin any work but in the name of Allah; not in the number of “786”, or any other substitution.