Sura Luqmān 31:13

وَإِذْ قَالَ لُقْمَٰنُ لِٱبْنِهِۦ وَهُوَ يَعِظُهُۥ يَٰبُنَىَّ لَا تُشْرِكْ بِٱللَّـهِ إِنَّ ٱلشِّرْكَ لَظُلْمٌ عَظِيمٌ

wa-idh qalā luqmānu li-ibnihi wa-huwa yaʿiẓuhu yā-bunayya lā tushrik billāhi inna l-shirka la-ẓulmun ʿaẓīmun

Behold, Luqman said to his son by way of instruction: "O my son! join not in worship (others) with Allah: for false worship is indeed the highest wrong-doing."