Arabic citations of جهل

c. 1150, Al-Ghazali, The Revival of Religious Sciences :
وَمَنْ جَهِلَ قَلْبَهُ فَهُوَ بِغَيِرِهِ أَجْهَلُ
waman jahila qalbahu fahuwa biḡayirihi ʔajhalu
And whoever ignores his own heart is most ignorant of the rest (of his affairs)