Hisham narrates from his father that the Prophet (peace and blessings be upon him) came to Sayyidah Aishah (may Allah be pleased with her), and she said: "This is so-and-so," and her prayer was being mentioned. He (peace and blessings be upon him) said: "Stop! Allah does not grow weary until you yourselves grow weary, and the most beloved worship is that which is done constantly."
(b) Abu Bakr al-Isma'ili explains his (peace and blessings be upon him) statement 'Fa inna Allaha la yamallu hatta tamallu' "Indeed Allah does not grow weary until you yourselves grow weary" as meaning that Allah does not grow weary of giving reward until you grow weary of doing deeds.
(Note) Using the word "weariness" for Allah is not correct, since Allah Almighty does not tire.
(c) These words were brought only to match wording with wording, and this is permissible in the speech of the Arabs, as in the saying of Allah Almighty: "The recompense of an evil deed is an evil like it" [Surah al-Shura: 40]. Here the first word "evil" means sin, and the second word means recompense.
Retaliation (qisas) is justice, not evil, as in the saying of Allah Almighty: "So whoever transgresses against you, transgress against him in the same measure as he transgressed against you" [Surah al-Baqarah: 194].
In retaliation there is neither injustice nor transgression; the use of identical words is only for matching the wording.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4738