HE (SALLALLAHU ALAIHI WASALLAM) IS A CLASS APART

When other babies are born, they cry, but the Holy Prophet (Sallallahu alaihi wa sallam) arrived reciting the Kalima and performing the Sajdah and giving the whole world glad tidings of happiness.  No sooner than He performed a Sajdah that the whole earth became worthy of prostration.  For the earlier Ummah, it was the rule that whenever they wanted to pray, they could pray only in special places.  Apart from that special place, they could not pray anywhere else. 

When the Great Flood came in the time of Prophet Nooh (Peace be upon him), the whole earth was washed, but even then it did not become pure, but the Holy Prophet (Sallallahu alaihi wa sallam) only had to step onto this earth that the whole earth not only became pure but purifying.  The earlier Ummah did not have Tayammum, but because of the blessings of the feet of the Holy Prophet (Sallallahu alaihi wa sallam), the earth became so pure that if any follower of the Prophet does not get water, then he/she can perform Tayammum.