Al-Baqarah 2:249 فلما فصل طالوت بالجنود قال ان الله مبتليكم بنهر فمن شرب منه فليس مني ومن لم يطعمه فانه مني الا من اغترف غرفة بيده فشربوا منه الا قليلا منهم فلما جاوزه هو والذين امنوا معه قالوا لا طاقة لنا اليوم بجالوت وجنوده قال الذين يظنون انهم ملاقو الله كم من فية قليلة غلبت فية كثيرة باذن الله والله مع الصابرين ٢٤٩

So, when Tālūt set out along with the troops, he said: “Allah is going to test you by a river, so, whoever drinks from it is not my man, and whoever does not taste it is surely a man of mine, except the one who scoops a little with his hand.” Then they drank from it, except a few of them. So, when it (the river) was crossed by him and by those who believed with him, they said: “There is no strength with us today against Jālūt and his troops.” Said those who believed in their having to meet Allah: “How many small groups have overcome large groups by the will of Allah. Allah is with those who remain patient.”