Surah Al-Mu'minun, ayah 66

قَدۡ كَانَتۡ ءَايَٰتِي تُتۡلَىٰ عَلَيۡكُمۡ فَكُنتُمۡ عَلَىٰٓ أَعۡقَٰبِكُمۡ تَنكِصُونَ ٦٦

Qad kānat āyātī tutlā 'alaykum fakuntum 'alā a'qābikum tankisūn

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