Whoever says ten times immediately after finishing the Fajr/Maghrib Prayer..

On the authority of Abu Dharr (radhy Allahu anhu), that the Prophet (sallAllahu alayhi wasallam) said:

“Whoever says ten times immediately after finishing the Fajr (Dawn) Payer, before moving from his place or talking to anyone:

“laa ilaaha illallaahu wahdahu laa shareeka lahu, lahul mulku wa lahul hamdu yuhyee wa yumeetu wa huwa alaa kulli shay’in qadeer”
[none has the right to be worshipped except Allaah alone having no partner, sovereignty is His and all praise is for Him and He brings life and He causes death and He has full power over everything]

.. ten good deeds will be recorded for him, ten sins will be eliminated from him, he will be upgraded ten degrees (in reward), he will be safeguarded from all kinds of harm all that day, he will be guarded against shaytan and no sin can overtake him on that day (and nullify his good deeds) except associating others in worship with Allaah. (At Tirmidhi no.3484 [5/515])

At-Tirmidhi commented on this hadeeth saying, “This is a hasan, saheeh hadeeth (i.e a good and authentic hadeeth).”

Likewise it is an act of Sunnah to say dhikr ten times straight after Magrib salah too, according to a hadith related by Imaam Ahmad Hanbal (rahimahullah) on the authority of Umm Salamah (radhy Allahu anha), hadith number 26430. Also stated in Sahih Ibn Hibban no. 2023.

Source: A Summary of Islamic Jurisprudence – Dr. Salih al-Fawzaan, Volume 1, Chapter 10

“The comfort and rest of the lover and the pleasure of his eye lies in the prayer but the unmindful one who turns away has no share of this. Rather the prayer is too great and burdensome for him. When he stands (for prayer) it is as if he is standing on hot coals, until he finishes from the obligatory section of the prayer. He hastens it and speeds (his performance of it). Thus, there is no pleasure of the eye for him in it and there is no rest and comfort for his heart in it. 

Yet the servant, when his eye finds pleasure in something and his heart finds comfort in it, then the hardest thing for him is to separate from it. But the pretender, whose heart is empty of Allaah’s remembrance and the home of the hereafter and who is put to trial by the world, the hardest thing for him is the prayer and the most hated thing to him is it’s lengthiness, even though he is sound in health, idle and unoccupied.”

Ibn al-Qayyim al-Jawziyyah, The Path to Guidance, page 34-35. Will post ‘The Prayer of the Lovers’ soon inshaa’ Allah, very beneficial!