«يَشِيبُ ابْنُ آدَمَ وَيَشِبُّ فِيهِ خَصْلَتَانِ: الْحِرْصُ وَطُولُ الْأَمَلِ»
A human being grows old, while two traits remain vigorous in him: greed and extended hope.
Khaṣlatān is a dual: two traits are announced before they are identified. Al-ḥirṣ and ṭūl al-amal then specify the two. The latter phrase is not idle restatement but the disclosure of initially unnamed particulars.
The wāw joins the two names in the explanation; it does not join two independent discourse judgments of the type considered under faṣl and waṣl.