Acknowledgment of human limitation

وَزَكَرِيَّآ إِذْ نَادَىٰ رَبَّهُۥ رَبِّ لَا تَذَرْنِى فَرْدًا وَأَنتَ خَيْرُ ٱلْوَٰرِثِينَ

And [mention] Zechariah, when he called to his Lord, "My Lord, do not leave me alone [with no heir], while You are the best of inheritors."