"Each of the two gardens brought forth its fruit," meaning it yielded its produce. "And did not slacken anything thereof," meaning it did not decrease it.
﴿كلتا الجنتين آتت أكلهَا﴾ أَطْعَمَتْ ثَمَرَتْهَا ﴿وَلَمْ تَظْلِمْ مِنْهُ شَيْئا﴾ أَيْ: تَنْقُصْ.
