Yusuf - 12:7

لَّقَدْ كَانَ فِي يُوسُفَ وَإِخْوَتِهِ آيَاتٌ لِّلسَّائِلِينَ
[12:7]
Certainly in Yusuf and his brothers there are signs for the inquirers.
Verily in Joseph and his brethren are signs (or symbols) for seekers (after Truth).
Verily in Joseph and his brethren are signs (of Allah's Sovereignty) for the inquiring.