[19].Surah Maryam [Mary]: Ayat 35

Ayat 35. It befits not (the Majesty of) Allah that He should beget a son [this refers to the slander of Christians against Allah, by saying that 'Iesâ (Jesus) is the son of Allah]. Glorified (and Exalted be He above all that they associate with Him). When He decrees a thing, He only says to it, "Be!" and it is.

[Tafseer] Begetting a son is a physical act depending on the needs of men's animal nature. Allah Most High is independent of all needs, and it is derogatory to Him to attribute such an act to Him. It is merely a relic of pagan and anthropomorphic materialist superstitions. 

Hazrat Ibn Abbas (Allah be pleased with both of them) reported that when Messenger of Allah [SAWW](PBUH) came to Medina, he found the Jews observing the fast on the day of Ashura. They (the Jews) were asked about it and they said: It is the day on which Allah granted victory to Moses and (his people) Bani Israel over the Pharaoh and we observe fast out of gratitude to Him. Upon this the Messenger of Allah [SAWW](PBUH) said: We have a closer connection with Moses than you have, and he commanded to observe fast on this day.

[Muslim Book 6, Number 2518]

Lesson : 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 [PBUH]emancipation from Pharaoh on this day, and so they observed Saum in token of their joy. On this, he [SAWW](PBUH) said that in this happiness of Prophet Musa [PBUH], 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.