31:13
وَإِذْ قَالَ لُقْمَـٰنُ لِٱبْنِهِۦ وَهُوَ يَعِظُهُۥ يَـٰبُنَىَّ لَا تُشْرِكْ بِٱللَّهِ ۖ إِنَّ ٱلشِّرْكَ لَظُلْمٌ عَظِيمٌ
wa-idh qāla luq'mānu li-ib'nihi wahuwa yaʿiẓuhu yābunayya lā tush'rik bil-lahi inna l-shir'ka laẓul'mun ʿaẓīmun
Luqman counselled his son, ‘My son, do not attribute any partners to God: attributing partners to Him is a terrible wrong.’
And (remember) when Luqmân said to his son when he was advising him: "O my son! Join not in worship others with Allâh. Verily joining others in worship with Allâh is a great Zûlm (wrong) indeed.