[19].Surah Maryam [Mary] : Ayat 36

Ayat 36. ['Iesâ (Jesus) said]: "And verily Allah is my Lord and your Lord. So worship Him (Alone). That is the Straight Path. (Allah's Religion of Islamic Monotheism which He did ordain for all of His Prophets)."

[Tafseer] As opposed to the crooked superstitions which take refuge in all sorts of metaphysical sophistries to prove three in one and one in three. In the Qur'an there is no crookedness (18:1). Christ's teaching was simple, like his life, but the Christians have made it crooked.  

Hazrat Abu Qatadah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) was asked about observing As-Saum (the fast) on the tenth day of Muharram, and he replied, "It is an expiation for the sins of the preceding year.''

[Muslim Book 06,Chapter 33, Hadith # 2603] 

Lesson : as mentioned above in Surah Maryam Ayat 36."That is the Straight Path" Ashura' 10th of Muharram. In another Hadith, it is stated that when the Prophet [SAWW](PBUH) emigrated from Makkah to Al-Madinah, he saw that the Jews were fasting on this day. He asked them why they did this on that day, and they told him that they did it for the reason that Allah granted Prophet Musa emancipation from Pharaoh on this day, and so they observed Saum in token of their joy. On this, he (PBUH) said that in this happiness of Prophet Musa, Muslims have a greater right to observe Saum than the Jews. Consequently, he also observed Saum on 10th of Muharram. Then, he said that if he lived the following year, he would observe Saum on 9th of Muharram also so that they would make themselves different from the Jews. According to another Hadith, he (PBUH) ordained the Muslims to observe Saum on `Ashura' and in addition one more Saum on 9th or 11th of Muharram in opposition to the Jews. Some people think these words stand to mean that `he will observe Saum on the 9th of Muharram only. But this interpretation does not agree with other Ahadith. In order to oppose the Jews, he [SAWW](PBUH) resolved to observe one more Saum with that of 10th of Muharram and ordained it for the Muslims. In this connection, we have quoted above the authority from Musnad Ahmad. Hence, the meanings we have given in the translation of the text are correct.