An old man was sitting in the courtyard of his house along with his son who had received a high education. Suddenly a crow perched on a wall of the house. The father asked the son: What is this? The son replied: It is a crow. After a little while the father again asked the son: What is this? The son said: It is a crow.
After a few minutes the father asked his son the third time: What is this? The son said: Father, I have just now told you that this is a crow. After a little while the old father again asked his son the fourth time: what is this? By this time some statement of irritation was felt in the son's tone when he rebuffed his father: Father! It is a crow, a crow. A little after the father again asked his son: What is this? This time the son replied to his father with a vein of temper. Father: You are always repeating the same question, although I have told you so many times that it is a crow. Are you not able to understand this?
The father went to his room and came back with an old diary. Opening a page he asked his son to read what was written. What the son read were the following words written in the diary:
'Today my little son was sitting with me in the courtyard, when a crow came there. My son asked me twenty-five times what it was and I told him twenty-five times that it was a crow and I did not at all feel irritated. I rather felt affection for my innocent child.'
The father then explained to his son the difference between a father's and a son's attitude. While you were a little child you asked me this question twenty-five times and I felt no irritation in replying to the question twenty-five times and when today I asked you the same question only five times, you felt irritated, annoyed and impatient with me.
Allah mentions in Surah Bani-Israil 17:23-24
And your Lord has decreed that you worship none but Him. And that you be dutiful to your parents. If one of them or both of them attain old age in your life, say not to them a word of disrespect, nor shout at them but address them in terms of honour.
And lower unto them the wing of submission and humility through mercy, and say: "My Lord! Bestow on them Your Mercy as they did bring me up when I was small."