Narrated Al-Miqdam
The Prophet ﷺ saidNobody has ever eaten a better meal than that which one has earned by working with one's own hands. The Prophet of Allah, David used to eat from the earnings of his manual labor. Sahih Bukhari
Vol. 3 Book 34 Hadith 286 
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Allah SWT chose Saul as the first king for the Israelite. After their small army defeated Goliath, Allah SWT chose Prophet David as the new king. He praised Allah SWT with the mountains. And he was blessed with wisdom, might of iron and the Psalms. | |  002:246 Have you not considered the assembly of the Children of Israel after (the time of) Moses, when they said to a prophet of theirs, "Send to us a king, and we will fight in the way of Allah"? He said, "Would you perhaps refrain from fighting if fighting was prescribed for you?" They said, "And why should we not fight in the cause of Allah when we have been driven out from our homes and from our children?"
But when fighting was prescribed for them, they turned away, except for a few of them. And Allah is Knowing of the wrongdoers. | |
002:247 And their prophet said to them, "Indeed, Allah has sent to you Saul as a king." They said, "How can he have kingship over us while we are more worthy of kingship than him and he has not been given any measure of wealth?"
He said, "Indeed, Allah has chosen him over you and has increased him abundantly in knowledge and stature. And Allah gives His sovereignty to whom He wills. And Allah is all-Encompassing (in favor) and Knowing." | |
| 002:248 And their prophet said to them, "Indeed, a sign of his kingship is that the chest will come to you in which is assurance from your Lord and a remnant of what the family of Moses and the family of Aaron had left, carried by the angels. Indeed in that is a sign for you, if you are believers." | |
002:249 And when Saul went forth with the soldiers, he said, "Indeed, Allah will be testing you with a river. So whoever drinks from it is not of me, and whoever does not taste it is indeed of me, excepting one who takes (from it) in the hollow of his hand." But they drank from it, except a (very) few of them.
Then when he had crossed it along with those who believed with him, they said, "There is no power for us today against Goliath and his soldiers." But those who were certain that they would meet Allah said, "How many a small company has overcome a large company by permission of Allah. And Allah is with the patient." | |
| 002:250 And when they went forth to (face) Goliath and his soldiers, they said, "Our Lord, pour upon us patience and plant firmly our feet and give us victory over the disbelieving people." | |
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