فَلَمَّا فَصَلَ طَالُوۡتُ بِالۡجُـنُوۡدِۙ قَالَ اِنَّ اللّٰهَ مُبۡتَلِيۡکُمۡ بِنَهَرٍ​ۚ فَمَنۡ شَرِبَ مِنۡهُ فَلَيۡسَ مِنِّىۡ​ۚ وَمَنۡ لَّمۡ يَطۡعَمۡهُ فَاِنَّهٗ مِنِّىۡٓ اِلَّا مَنِ اغۡتَرَفَ غُرۡفَةً ۢ بِيَدِهٖ​​ۚ فَشَرِبُوۡا مِنۡهُ اِلَّا قَلِيۡلًا مِّنۡهُمۡ​ؕ فَلَمَّا جَاوَزَهٗ هُوَ وَالَّذِيۡنَ اٰمَنُوۡا مَعَهٗ ۙ قَالُوۡا لَا طَاقَةَ لَنَا الۡيَوۡمَ بِجَالُوۡتَ وَجُنُوۡدِهٖ​ؕ قَالَ الَّذِيۡنَ يَظُنُّوۡنَ اَنَّهُمۡ مُّلٰقُوا اللّٰهِۙ کَمۡ مِّنۡ فِئَةٍ قَلِيۡلَةٍ غَلَبَتۡ فِئَةً کَثِيۡرَةً ۢ بِاِذۡنِ اللّٰهِ​ؕ وَاللّٰهُ مَعَ الصّٰبِرِيۡنَ‏ ﴿2:249﴾

(2:249) When Saul (Talut) set out with his forces he said: “Allah will try you with a river, and whoever drinks of it does not belong to me; he who refrains from tasting it – unless it be just a palmful – he indeed belongs to me.” Then all, except a few of them, drank their fill at the river.²⁷¹

But as soon as Saul (Talut) and the believers with him went forth across the river, they said: “Today we have no strength to face Goliath (Jalut) and his forces.”²⁷² But those who believed that they were bound to meet their Lord said: “How often has a small party prevailed against a large party by the leave of Allah.” Allah is with those who remain steadfast. 

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Notes

271. This may refer either to the river Jordan or to some other river or stream in that region. Saul wanted to take the Israelite army across the river. He was aware, however, that there was little moral discipline and restraint left in them. Hence he hit upon this device to distinguish the worthy from the worthyless. Those who could not endure thirst even for a short while, would not be expected to remain steadfast in their confrontation with an enemy at whose hands they had already taken a beating. 

272. These were presumable the people who had shown their impatience on the bank of the river. (See the preceding note – Ed.)