The word(s) "isha" appears 36 time(s) in 34 verse(s) in Quran in Mohsin Khan translation.

(31) And during a part of the night (also) glorify His praises (i.e. Maghrib and 'isha prayers) and (so likewise) after the prayers [As-Sunnah, Nawafil - optional and additional prayers. And also glorify, praise and magnify Allah - Subhan Allah, Alhamdu lillah, Allahu-Akbar].

(32) And (remember) when the Prophet (صلى الله عليه وسلم) disclosed a matter in confidence to one of his wives (Hafsah), then she told it (to another i.e. 'Aishah). And Allah made it known to him; he informed part thereof and left a part. Then when he told her (Hafsah) thereof, she said: "Who told you this?" He said: "The All-Knower, the All-Aware (Allah) has told me."

(33) If you two (wives of the Prophet صلى الله عليه وسلم : 'Aishah and Hafsah رضي الله عنهما) turn in repentance to Allah, (it will be better for you), your hearts are indeed so inclined (to oppose what the Prophet صلى الله عليه وسلم likes); but if you help one another against him (Muhammad صلى الله عليه وسلم), then verily, Allah is his Maula (Lord, or Master, or Protector), and Jibril (Gabriel), and the righteous among the believers; and furthermore, the angels are his helpers.

(34) And during night, prostrate yourself to Him (i.e. the offering of Maghrib and 'isha' prayers), and glorify Him a long night through (i.e. Tahajjud prayer).