قَدْ كَانَتْ ءَايَـٰتِى تُتْلَىٰ عَلَيْكُمْ فَكُنتُمْ عَلَىٰٓ أَعْقَـٰبِكُمْ تَنكِصُونَ

Qad kanat ayatee tutlaAAalaykum fakuntum AAala aAAqabikum tankisoon

My verses had already been recited to you, but you were turning back on your heels.