وَالرِّيحُ تَعْبَثُ بِالْغُصُونِ وَقَدْ جَرَى ذَهَبُ الْأَصِيلِ عَلَى لُجَيْنِ الْمَاءِ
The wind plays with the branches, as the late-afternoon gold flows over the silver of the water.
“Gold of the late afternoon” aligns the sunset glow with gold, while “silver of the water” aligns reflective water with silver.
The model term is linked to what it describes by an iḍāfah (genitive construction), rather than by an overt particle of comparison, strengthening the identification.
The imagery should not be read as literal gold or silver in the scene; its function is to heighten the visible colors and sheen.