ف َهُوَ ‹الحَجَرُ الَّذِي رَفَضْتُمُوهُ أيُّها البَنّاؤُونَ، وَالَّذِي صارَ حَجَرَ الأساسِ.›
This is the ‘stone which was rejected by you builders, which has become the chief cornerstone.’