Three tiny things in date's seed mentioned in Koran to give examples:

From right to left
1- Katmeer-----2- Fateel-------3- Naqeer

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Three tiny things are found inside the date's seed have been mentioned in Koran.
Even if they are tiny but they have significant meanings, therefore, the Great Almighty Allah mentioned them in Koran to give an example for those not aware to His great superiority, and they are as follows:
1- The "Katmeer" which it is the thin covering membrane to the seed, and Allah said in His Koran:
"Who entered the night into day and entered the day into night, who He employed the sun and the moon to go in a certain definite period.
That's your God who predominated over all beings, and those whom you ask their worship to be thy goddess other than Allah, they don't possess something is larger than katmeer.
2- The Fateel: it is the thin thread or the flakey –shape that it is extending over the groove obviously seen at the external one side of the seed.
Allah mentioned this tiny part in Koran to give an example:
The day when We summoned all people to be present separately heading by their certain Prophets, hence, who they take the Books by their right hands really will read their Books and will not prejudice even to a small tiny Fateel like.
3- The Naqeer: it is the smaller thing of all the aforementioned parts, which displays as a small dot appearing at the back of the seed on the side is paralleling to the groove, this example has been mentioned in Koran twice, as the Great and Almighty Allah said:
1- Who faithfully sought for good deeds whether he is female or male, those will enter the Heaven and will not prejudice even to a similar thing is alike this tiny Naqeer.
2- In the second verses of the Holy Koran, Allah resembled the man whatsoever he is rich, but he is incapable to give charity to others as this amount of the Naqeer, which it is considered nothing, to Allah whole property.