Surah Al-Kawthar (Chapter 108). One of the shortest surahs of the Qur’an. Its number of verses is only three. It says:
The mathematical wonder of Surah Al Kawthar!
Verily, I have bestowed upon you Al-Kawthar.
So pray to your Lord and sacrifice.
Verily, he who harbors enmity towards you is annihilated.
In the second verse of this sura, which consists of three verses, it is commanded to perform Sacrifice. The word نحر means to sacrifice a camel.
And the sacrifice is done on the 10th of the month of Zilhajj. Surprisingly, the number 10 is coded in various ways in Surah Al-Kawthar.
If you notice, it will be seen that the letter at the end of each verse is ‘ر’ (ر). In Arabic, the letter ‘ر’ is the 10th letter of the Arabic alphabet.