زِلْفٌ
A meadow; synonym رَوْضَةٌ; (TS, K;) and so
زَلَفَةٌ: (IB, TA:) thus the latter is explained as occurring in a tradition relating to Ya-jooj and Ma-jooj, in which it is said, ثُمَّ يُرْسِلُ اللّٰهُ مَطَرًا فَيَغْسِلُ الأَرْضَ
حَتَّى يَتْرُكَهَا كَالزَّلَفَةِ [Then God will send rain, and it will wash the earth so that it will leave it like the meadow]: but in this instance, several other meanings are assigned to it: see زَلَفَةٌ below. (TA.)