The ruling on one who habitually drinks with the final adhan

Question : The questioner says: A man wakes up with the final adhan, and when he hears Allahu Akbar, he drinks. He has become accustomed to this. Is his fast valid? Please give us a ruling.

Answer : As for his fast, it is valid, but his habit is bad. What a person should do is be cautious with his religion and not let the Fajr adhan be called until he has finished everything, especially if the mu'adhdhin is careful and does not call the adhan until he is certain that Fajr has appeared. In that case, it is obligatory for him to abstain, and a person should not be negligent. The difference is one or two minutes, and it is amazing that some people...
...when the adhan is called, they eat and drink and issue a ruling for themselves that as long as the mu'adhdhin has not completed the adhan, they may eat and drink. But this is not correct. If the mu'adhdhin does not call the adhan until after Fajr has appeared, it is obligatory to abstain from the moment one hears the mu'adhdhin. The most that has been reported is that it is in Musnad al-Imam Ahmad that if a person hears the mu'adhdhin and the vessel is in his hand, there is no harm in drinking as long as the vessel is in his hand and he has prepared to drink, then let him drink. This is the most explicit report from the Prophet (peace and blessings be upon him) in this matter. Yes.