Prophetic Humility and Limitations

قُلْ إِنْ أَدْرِىٓ أَقَرِيبٌ مَّا تُوعَدُونَ أَمْ يَجْعَلُ لَهُۥ رَبِّىٓ أَمَدًا

Say, "I do not know if what you are promised is near or if my Lord will grant for it a [long] period."