Story
Words vs. Actions - The boy who liked eating sweets
There once was a boy who loved eating sweets. He always asked for sweets from his father. His father was a poor man. He could not always afford sweets for his son. But the little boy did not understand this, and demanded sweets all the time.
The boy's father thought hard about how to stop the child asking for so many sweets. There was a very holy man living nearby at that time. The boy's father had an idea. He decided to take the boy to the great man who might be able to persuade the child to stop asking for sweets all the time.
The boy and his father went along to the great man. The father said to him, "O great saint, could you ask my son to stop asking for sweets which I cannot afford?" The great man was in difficulty, because he liked sweets himself. How could he ask the boy to give up asking for sweets? The holy man told the father to bring his son back after one month.
During that month, the holy man gave up eating sweets, and when the boy and his father returned after a month, the holy man said to the boy "My dear child, will you stop asking for sweets which your father cannot afford to give you?"
From then on, the boy stopped asking for sweets.
The boy's father asked the saint, "Why did you not ask my son to give up asking for sweets when we came to you a month ago?" The saint replied, "How could I ask a boy to give up sweets when I loved sweets myself. In the last month I gave up eating sweets."
Morals
A person's example is much more powerful than just his words. When we ask someone to do something, we must do it ourselves also. We should not ask others to do what we do not do ourselves.
Quran verse
وَلَا تَقُولَنَّ لِشَا۟ىْءٍ إِنِّى فَاعِلٌ ذَٰلِكَ غَدًا
And never say about anything, “I will do that tomorrow.”
[Quran, 18:23]
إِلَّآ أَن يَشَآءَ ٱللَّهُ وَٱذْكُر رَّبَّكَ إِذَا نَسِيتَ وَقُلْ عَسَىٰٓ أَن يَهْدِيَنِ رَبِّى لِأَقْرَبَ مِنْ هَٰذَا رَشَدًا
Without saying, “If Allah wills.” And remember your Lord if you forget, and say, “Perhaps my Lord will guide me to nearer than this in integrity.”
[Quran, 18:24]
Hadith
Also on the authority of Omar, who said : One day while we were sitting with the messenger of Allah there appeared before us a man whose clothes were exceedingly white and whose hair was exceedingly black; no signs of journeying were to be seen on him and none of us knew him. He walked up and sat down by the prophet. Resting his knees against his and placing the palms of his hands on his thighs, he said:"O Muhammed, tell me about Islam". The messenger of Allah said: "Islam is to testify that there is no god but Allah and Muhammed is the messenger of Allah, to perform the prayers, to pay the zakat, to fast in Ramadhan, and to make the pilgrimage to the House if you are able to do so." He said:"You have spoken rightly", and we were amazed at him asking him and saying that he had spoken rightly. He said: "Then tell me about eman."He said:"It is to believe in Allah, His angels, His books, His messengers, and the Last Day, and to believe in divine destiny, both the good and the evil thereof." He said:"You have spoken rightly". He said: " Then tell me about ehsan." He said: "It is to worship Allah as though you are seeing Him, and while you see Him not yet truly He sees you". He said: "Then tell me about the Hour". He said: "The one questioned about it knows no better than the questioner." He said: "Then tell me about its signs." He said: "That the slave-girl will give birth to her mistress and that you will see the barefooted, naked, destitute herdsman competing in constructing lofty buildings." Then he took himself off and I stayed for a time. Then he said: "O Omar, do you know who the questioner was?" I said: "Allah and His messenger know best". He said: "He was Jebreel (Gabriel), who came to you to teach you your religion." Narrated by Muslim.
[40 Nawawis Hadiths, No. 2]