Q 32: What is the textual proof that Sawm (Fasting) is obligatory?

Q 32: What is the textual proof that Sawm (Fasting) is obligatory?

Q 32: What is the textual proof that Sawm (Fasting) is obligatory? 

A--- Allah, the Almighty says: {O you who believe! Observing As-Sawm (the Fasting)[2] Is prescribed for you as it was prescribed for those before you).

(Al-Baqarah, 183)

Allah says: {So whoever of you sights (the crescent on the first night of the month (of Ramadan i.e. is present at his home), he must observe Sawm (fasts) that month}.

(Al-Baqarah, 185)

According to a Hadith, a Bedouin said to Allah's Messenger (Peace be upon him): Tell me the Fast that Allah makes obligatory for me. He (Peace be upon him) said: 

"The month of Ramadan. The inquirer said: Am I obliged to fast anything else besides this? He (the Prophet (Peace be upon him)) said: No, except that which you observe out of your own free will".

(Sahih Bukhari)