سئل النبي صلى الله عليه وسلم عن ربه فنزل: { قل هو الله أحد } فالله خبر هو وأحد بدل منه أو خبر ثان.
The Prophet, may God bless him and grant him peace, was asked about his Lord, so the following verse was revealed: “Say, ‘He is God, the One.’” So God is the predicate of “He,” and “One” is a substitute for it or a second predicate.
