The following series of hadeeth are from the Chapter of Fasting from ‘Umdat-ul-Ahkaam (a book of hadeeth on fiqh which are ‘agreed upon’ – i.e. present in Saheeh al-Bukhaaree and Saheeh Muslim)

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From Anas ibn Maalik radi Allaahu ‘anhu who said:
The Messenger of Allaah sall Allaahu ‘alahi wa sallam said:
 
Take the suhoor (the pre dawn meal) for there is indeed blessing in the suhoor.

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The Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah commented:

In this hadeeth, Anas ibn Maalik radi Allaahu ‘anhu informed that the Prophet sall Allaahu ‘alaihi wa sallam commanded the fasting people to (take) suhoor so that they can acquire nourishment and they remain in full strength.

And he sall Allaahu ‘alaihi wa sallam made clear that there is blessing in this suhoor, clarifying that as an encouragement upon that and as an incitement upon that.

And blessing (may) be either a deeni blessing, and that is complying with the command of the Prophet sall Allaahu ‘alaihi wa sallam and taking him as an example to be followed and opposing the People of the Book (the Jews and the Christians) and what occurs as a result of that by way of reward and strength upon fasting.

Or it may be related to the dunyaa (worldly life), such as taking pleasure from the halaal food and drink which he desires and protecting one’s bodily strength and its energy.

(taken from Sh Uthaymeen’s explanation of ‘Umdat-ul-Ahkaam
translated by Nasser ibn Najam)