The time after Fajr is a time of immense barakah (blessings). Why would it not be filled with blessings when Rasulullah (sallallahu ‘alaihi wasallam) made the following du‘aa for his Ummah:

“O Allah, bless my Ummah (in their work) in the early part of the morning”

(Tirmizi #1212).

It is however, obvious that to receive this barakah one will have to be awake. A person sleeping at this time is deprived of this blessings.

Sleeping after Fajr is a detestable practice, unless due to weakness, illness or any other valid reason. If one needs to sleep, he should do so after sunrise, though it is better to rather take a short nap in the afternoon.

‘Abdullah bin ‘Amr (radhiyallahu ‘anhuma) once passed by a person sleeping after Fajr Salaah. ‘Abdullah (radhiyallahu ‘anhu) shook him awake and remarked: “Don’t you know that Allah Ta‘ala pays particular attention to His creation at this part of the morning and out of His sheer mercy He admits a great number of people into Jannah.”

(Tabraani - Majma‘uz Zawaaid #1816)

‘Aaishah (radhiyallahu ‘anha) narrates that Rasulullah (sallallahu ‘alaihi wasallam) said: “Search for your rizq (sustenance) in the morning because the morning is a time of blessing and success”

(Bazzaar & Tabraani - Majma‘uz Zawaaid #6280).

Rasulullah (sallallahu ‘alaihi wasallam) is also reported to have declared: “Sleeping in the morning hinders sustenance.”

(Ahmad - Majma‘uz Zawaaid #6290)

The word “rizq” is a comprehensive word which includes spiritual progress, physical well-being, one’s livelihood, academic work, household duties, etc. Any work done at this time is guaranteed to have barakah. There will also be much ease and greater hope of success.

The habit of sleeping after Fajr should therefore be changed. This time should be used especially for tilaawah, zikr or any other work. Many great ‘Ulama even disliked talking at this time unless it was something urgent. Genuine necessity is nevertheless excluded.
http://alhaadi.org.za/articles-publi...t-barakah.html