﴿ تُؤْتِىٓ أُكُلَهَا كُلَّ حِينٍۭ بِإِذْنِ رَبِّهَا ۗ وَيَضْرِبُ ٱللَّهُ ٱلْأَمْثَالَ لِلنَّاسِ لَعَلَّهُمْ يَتَذَكَّرُونَ ﴾

“yielding its fruit at all times by its Sustainer's leave. And [thus it is that] God propounds parables unto men,' so that they might bethink themselves [of the truth].”

Please check ayah 14:26 for complete tafsir.