If the time for prayer arrives while one is in the middle of a procedure, should he pray during it or wait?

The questioner : ... He prays for five minutes, you can't wait, the time for Fajr will pass on us, should I pray during the procedure or wait until I am finished?

The Shaykh : Do not pray during the procedure.

The questioner : Speaking like that...

The Shaykh : Speaking invalidates the prayer, but movements may or may not invalidate it, such as the prayer of fear, for example . So if a person imagines himself, as you say, in a state of a serious surgical operation where he cannot postpone the operation, and if he waits until it is finished, the time for the prayer will pass, whether it is the Fajr prayer, the 'Isha' prayer, or the 'Asr prayer. These three prayers must not be delayed beyond their times for any of the legitimate excuses. Unlike, for example, the Zuhr and 'Asr prayers, where the person performing the operation, whether he is a surgeon or an assisting nurse, can know when the operation will start and thus combine them by advancing or delaying. You know about combining by advancing and combining by delaying. Likewise, regarding the Maghrib and 'Isha' prayers, it is possible to combine them by advancing or delaying. However, it is not permissible to delay the 'Asr prayer until after the setting of the sun, nor is it permissible to delay the 'Isha' prayer until after the middle of the night, not until the appearance of Fajr. It is not permissible to delay the Fajr prayer until the rising of the sun. So if the situation is between praying outside the time or praying within the time even with some movements, then the latter is better than the former, because the former has no prayer. The one who delays the prayer until after its time, for example Fajr after the rising of the sun, if he prays, he has no prayer. But if he prays by gesturing, praying with signs, then he has an excuse for this. Let's go, our brothers, Abu 'Abdullah.

The questioner : Yes, Shaykh.

The Shaykh : What did he answer?

The questioner : By Allah, it looks like he is a bit busy, he is not reaching...