Qur'an 12:46

يُوسُفُ أَيُّهَا ٱلصِّدِّيقُ أَفْتِنَا فِى سَبْعِ بَقَرَٰتٍ سِمَانٍ يَأْكُلُهُنَّ سَبْعٌ عِجَافٌ وَسَبْعِ سُنۢبُلَـٰتٍ خُضْرٍ وَأُخَرَ يَابِسَـٰتٍ لَّعَلِّىٓ أَرْجِعُ إِلَى ٱلنَّاسِ لَعَلَّهُمْ يَعْلَمُونَ

(And when he came to Joseph in the prison, he exclaimed): Joseph! O thou truthful one! Expound for us the seven fat kine which seven lean were eating and the seven green ears of corn and other (seven) dry, that I may return unto the people, so that they may know.