Reciting Ayat-ul-Kursy and Al-Mu`awwidhatayn

Q 4: I heard that if a person recites Tahlil (saying: "La ilaha illa Allah (There is no God except Allah)") after the Maghrib (Sunset) and Fajr (Dawn) Prayers to their self before changing their position, they will be forgiven ten sins, given ten good deeds and another reward which I do not know. Is this Hadith Sahih (authentic) or not?

A: It is reported that after the Maghrib and the Fajr Prayer, a person should say: La ilaha illa Allah, wahdahu la sharika lah, lahul-mulku wa-lahul-hamdu, yuhyi wa yumit, wa-huwa `ala kulli shai’in qadeer (None has the right to be worshipped except Allah Who has no partner; to Him belong all sovereignty and praise; He gives life and causes death; and He is omnipotent over everything) ten times. Related by Ahmad. It is an addition to the Adhkar (invocations) permitted at other times. Al-Tirmidhy also related from Abu Dhar (may Allah be pleased with him) that the Messenger of Allah (peace be upon him) said: If, after the Fajr (Dawn) Prayer, a person says, "There is no God but Allah Who has no partner; to Him belong all sovereignty and praise; He gives life and causes death; and He is Omnipotent over everything" while their legs are still folded before speaking, ten times, Allah will write for them ten good deeds, efface ten evil deeds from them, and raise them ten degrees. On that day, they will be protected from every harm, guarded against Satan, and no sin will overtake them, unless they commit an act of Shirk (polytheism). (Part No. 7; Page No. 110)  Al-Tirmidhy said that it is Hassan Gharib (a good Hadith that is strange to come from this chain of narration) and Sahih (authentic). This Hadith was also related by Al-Nasa'y from Mu`adh with the addition of In His hand is the Good and also They will be rewarded for each one as if they had freed a slave. Al-Tirmidhy and Al-Nasa'y related from `Umarah ibn Shabib that the Messenger of Allah (peace be upon him) said: Whoever says "There is no God but Allah Who has no partner; to Him belongs all the sovereignty and praise; He gives life and causes death; and He is Omnipotent over everything" ten times after Maghrib (Sunset) Prayer, Allah will assign angels to protect them against Satan until morning; ten good deeds will be recorded for them; ten evil deeds will be effaced for them; and they will receive a reward like that of emancipating ten believing slaves. Al-Tirmidhy said that it is Hasan, but only reported from Layth ibn Sa`d. It is not known that `Imarah heard it from the Prophet (peace be upon him).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.