﴿ فَلَمَّا فَصَلَ طَالُوتُ بِٱلْجُنُودِ قَالَ إِنَّ ٱللَّهَ مُبْتَلِيكُم بِنَهَرٍۢ فَمَن شَرِبَ مِنْهُ فَلَيْسَ مِنِّى وَمَن لَّمْ يَطْعَمْهُ فَإِنَّهُۥ مِنِّىٓ إِلَّا مَنِ ٱغْتَرَفَ غُرْفَةًۢ بِيَدِهِۦ ۚ فَشَرِبُوا۟ مِنْهُ إِلَّا قَلِيلًۭا مِّنْهُمْ ۚ فَلَمَّا جَاوَزَهُۥ هُوَ وَٱلَّذِينَ ءَامَنُوا۟ مَعَهُۥ قَالُوا۟ لَا طَاقَةَ لَنَا ٱلْيَوْمَ بِجَالُوتَ وَجُنُودِهِۦ ۚ قَالَ ٱلَّذِينَ يَظُنُّونَ أَنَّهُم مُّلَٰقُوا۟ ٱللَّهِ كَم مِّن فِئَةٍۢ قَلِيلَةٍ غَلَبَتْ فِئَةًۭ كَثِيرَةًۢ بِإِذْنِ ٱللَّهِ ۗ وَٱللَّهُ مَعَ ٱلصَّٰبِرِينَ ﴾

“And when Saul set out with his forces, he said: "Behold, God will now try you by a river: he who shall drink of it will not belong to me, whereas he who shall refrain from tasting it - he, indeed, will belong to me; but forgiven shall be he who shall scoop up but a single handful." However, save for a few of them, they all drank [their fill] of it. And as soon as he and those who had kept faith with him had crossed the river, the others said: "No strength have we today [to stand up] against Goliath and his forces!" [Yet] those who knew with certainty that they were destined to meet God, replied: "How often has a small host overcome a great host by God's leave! For God is with those who are patient in adversity."”

Verse 249: قَالَ إِنَّ اللَّـهَ مُبْتَلِيكُم بِنَهَرٍ (He said: Allah is going to test you by a river). The wisdom behind this test, as perceived by this humble commentator, appears to be as follows. Not difficult to imagine is the excitement created on such occasions but there are not many who would stay firm in their hour of trial. And should such a time come, the weakness shown by such people becomes contagious making others panic as well. Allah Almighty willed that such people be pruned out. This purpose was accomplished by this test, which is very appropriate, because steadfastness is necessary in fighting. So, being patient, when water is made available without asking in a state of intense thirst, is a proof of steadfastness, and dashing for water is a proof of its absence. Later on comes the unusual: Those who drank too much water became mysteriously more incapacitated. This has appeared in Ruh al-Ma'ani on the authority of Ibn Abi Haim from Ibn ` Abbas ؓ . Now the events and sayings mentioned in this story tell us that there were three kinds of people among them: (1) The weak in faith who failed to make the grade in their hour of trial. (2) The perfect who fully succeeded in their trial but did feel concerned about how low they were in numbers. (3) The most perfect who did not bother even about that.