Abbas - Tanwîr al-Miqbâs min Tafsîr Ibn ‘Abbâs
(He it is Who sendeth down water) rain (from the sky, whence ye have drink) from the rain which remains in springs and rivers, (and whence are trees) and by means of which tress and vegetation grow (on which ye send your beasts to pasture) on which your cattle are sent to pasture.
He it is who sends down water from heaven.... Surely in that is a sign for a people who reflect... signs for a people who use intellect... a sign for a people who remember.
He is an allusion to the Essence, who is an intimation of the attributes, and sends down reports about the acts. Thus you will know that God has Essence, attributes, and acts. He is eternal in Essence, noble in attributes, wise in acts; without associate in Essence, without ambiguity in attributes, and without cause in acts. The servants gazes upon His artisanry, then flee from the artisanry to gaze upon the attributes, then flee from the attributes to gaze upon the Essence. These are the stations of the wayfarers' traveling and the degrees of the recognizers' recognition.
One must have reflection in gazing upon the artisanry, knowledge in gazing on the attributes, and remembrance in gazing on the Essence. This is why the Lord of the Worlds says, “Surely in that is a sign for a people who reflect.” Then, after that, He says, “signs for a people who use intellect.” Then, after that, He says “a sign for a people who remember.” In other words, recognition will be gained in this order: first reflection, then knowledge, then, at that point, he will remember through the continuity of knowledge. First he reflects, putting his gaze in its place. If no defect falls into his gaze, then inevitably he gains knowledge; and in reality there is no difference between intellect and knowledge. Then, after that, the gaze becomes continuous, and the continuity of the gaze is the remembering of which He speaks.
It has been said that He says “signs for a people who use intellect” in the plural only because someone gains many knowledges in order to become a recognizer, and every part of knowledge is gained through a different sign and indicator. The knower has signs and indicators before he becomes a recognizer of his Lord, because the indicator for one question is different from the indicator for another question. With one indicator he knows the necessity of gazing on Him, with many indicators he becomes a recognizer of his Lord, and with one indicator he knows that it is necessary to remember the various sorts of his knowledge.
The Blessings of Rain, and explaining how it is one of the Signs
When Allah mentions the blessings of cattle and other animals that He has granted mankind, He then mentions how He has blessed them by sending rain down from the sky above, which has been fulfilling the needs and bringing joy to people and their cattle. Allah says:
لَّكُم مَّنْهُ شَرَابٌ
(from it you drink) meaning, He made it fresh and pure so that they can drink it, not salty and undrinkable.
وَمِنْهُ شَجَرٌ فِيهِ تُسِيمُونَ
(and from it (grows) the vegetation on which you send your cattle to pasture.) meaning, from it He raised plants on which your cattle graze. Ibn `Abbas, `Ikrimah, Ad-Dahhak, Qatadah and Ibn Zayd, all said that this refers to grazing animals including camels.
(With it He causes crops to grow for you, olives, date palms, grapes, and every kind of fruit.) meaning, with this one kind of water, He makes the earth sprout plants with different tastes, colors, scents and shapes. For this reason He says,
إِنَّ فِى ذَلِكَ لآيَةً لِّقَوْمٍ يَتَفَكَّرُونَ
(Verily, in this there is indeed an evident proof and a manifest sign for people who give thought.) meaning, this is a sign and a proof that there is no god besides Allah, as He says:
(Is not He (better than your gods) Who created the heavens and the earth, and sends water down for you from the sky, from which We cause wonderful gardens full of beauty and delight to grow You are not able to cause the growth of their trees. Is there any ilah (god) with Allah Nay, but they are a people who make equals (to Him)!) (27:60).