كَأَنَّ ثَبِيرًا فِي عَرَانِينِ وَبْلِهِ / كَبِيرُ أُنَاسٍ فِي بِجَادٍ مُزَمَّلِ
Mount Thabīr, amid the sheets of heavy rain, resembles a venerable elder wrapped in a striped cloak.
Thabīr is a mountain, wabl heavy rainfall, bijād a striped wrap, and muzammal one wrapped up. Rain becomes a cloak around the mountain.