And if you fear (an enemy), perfrom Salât (pray) on foot or riding^[]. And when you are in safety, offer the Salât (prayer) in the manner He has taught you, which you knew not (before).

The verse mentioned above refers to Allah telling us that in any condition, regardless if one is in a war, or any other condition, it is a must to perform prayers. Now one can see most of the time, that the enemies are more than the believers in the battle field, but still there is no forgiveness for prayer, because in any condition help comes only through prayer (salah), regardless in the time of peace, or in the time of an emergency, or if someone is sick, or if one is in a financial difficulty. Whoever does not seek help through salah (prayer) from Allah, then he or she is only misguided by Satan.  

Isha is read about one and a half hour after mughrib.

And perform As-Salât (Iqâmat-as-Salât), and give Zakât, and Irka' (i.e. bow down or submit yourselves with obedience to Allâh) along with Ar­Raki'ûn.

O you who believe! Seek help in patience and As-Salât (the prayer). Truly! Allâh is with As-Sâbirin (the patient ones, etc.).

• Isha has four optional sets (rak'a), which are according to Prophetic traditions.

• And it has four obligatory sets (rak'a), The first two sets are read with the first chapter of the Qur'an (Surah fatiah) and a chapter (surah) after, and in the last two sets (rak'a) the first chapter (surah faitah) is only read (click here to view instructions on how to perform the first two sets (rak'a)) 

• Then there is two more sets (rak'a), which is according to Prophetic tradditions. 

• One has an option to perform to voluntary sets (raka') after.

• If one is not in practice of reading tahaajud (nightly optional prayers), which has a very big importance, then can read one, three, or five witr, according to what tradition one would like to follow from the Prophet. 

• After Mughrib prayer, while we were eating, talking, and so on, then before going to bed, Allah gives us a chance, for our food from dinner to receive circulation because of the movement in the prayer. And we do not sleep with a heavy stomach, and we have a chance to digest our food.

• Ourselves and our family, if we read five times prayers, our lifestyle is so organized, that everyone sleeps tension free, after making prostrations (sajdah), and seeking repentance.

• This prayer tells us that our day is over, whatever good or bad was done by us during the day, we should realize and seek repentance from the Most Merciful, Allah. And justify our daily dealings, because this may be the end of the day or possibly our last day. Because once we go to sleep, until we do not wake up, then our soul is out of our bodies.

Now one may ask, what benefit is Allah getting when his creature is practicing Islam?

Allah is our creator, and he orders the best for us. And by following his orders he does not benefit, but we as his creations benefit, and we have a peaceful and easy life.