Surah Al-Mu'minun, Verse 66

قَدۡ كَانَتۡ ءَايَٰتِي تُتۡلَىٰ عَلَيۡكُمۡ فَكُنتُمۡ عَلَىٰٓ أَعۡقَٰبِكُمۡ تَنكِصُونَ٦٦

qad kānat āyātī tut'lā ʿalaykum fakuntum ʿalā aʿqābikum tankiṣūna

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