"Faakiheen" (joyful), meaning: happy. "With what their Lord has given them," meaning: what He has bestowed upon them.
Muhammad said: "Faakiheen" is in the accusative case as a circumstantial qualifier (hal).
﴿فاكهين﴾ أَي: مسرورين ﴿بِمَا آتَاهُمْ رَبُّهُمْ﴾ أَي: أَعْطَاهُم.
قَالَ محمدٌ: ﴿فَاكِهِينَ﴾ نصب على الْحَال.
