In another Hadith, the Prophet (peace be upon him) said: The uttering of (these words): "Subhan Allah (Glory be to Allah); Al Hamdulilah (praise be to Allah). La Ilaha Illa Allah (there is no god but Allah), Wallahu Akbar (and Allah is the greatest) is dearer to me than anything over which the sun rises. [Sahih Muslim No. (2695)].
Praising Allah contains glorifying Allah and denying any attribute that is not proper to the Magnificence and Perfection of Allah. Praising Allah contains attributing all kinds of perfection to Allah (Glory be to Him). Tahlil (saying: La Ilaha Illa Allah) contains monotheism and devoting religion to Allah. Takbir (saying: Allah-u-Akbar) contains glorification to Allah (Glory be to Him) and announcing that there is nothing bigger than Him.
Then he said: "There is no might nor strength save in Allah." which is a word for seeking help. Saying Takbir is very suitable in such a time because when a person wakes up from sleep, he needs a high vigor, activity, and diligence; and the helper to all these is Allah alone. The word: "La Hawla wala Quwata illa billah (There is neither might nor power except with Allah!)" It contains authorization to Allah (may He be Glorified and Exalted) and denying any might or strength save in Allah. It also contains admission that a person does not possess anything of his matters, he cannot push away evil, and he has no might in bringing about goodness except by the will of Allah (Glory be to Him).
Then he said: "O Allah, forgive me, or invokes Allah, he shall be answered." Thus, the narration was mentioned with the word (or) which indicates doubt or it may mean variation i.e., if a person seeks Allah's Forgiveness, He shall forgive him and when he involves Allah, Allah shall answer his invocation.
Then he said: "If a person performs ablution, his Salah shall be accepted." In some narrations that were reported in Sahih Al Bukhari, the words were: "If a person performs ablution then offered Salah, his Salah shall be accepted." This is an indication to diligence and activity in performing the acts of worship an leaving laziness, inactiveness, sluggishness. Imam Al Bukhari (may Allah bestow mercy on his soul) reported this Hadith in the book of Tahajjud (performing supererogatory night Salah) in his Sahih, chapter on the excellence of the one who gets up at night to perform Salah.
That means: whoever offers Salah in that time and hastens to Salah in this case, his Salah shall be accepted because these are the times in which Salah is answered.
Al Hafizh ibn Hajar (may Allah bestow mercy on his soul) mentioned in his explanation to this Hadith a great benefit concerning giving much care to this kind of Dhikr. Abu `Abdullah Al Farbary reported that Al Bukhari said: "I kept mentioning this type of Dhikr frequently when I woke up, then when I slept, someone came to my in dream and recited: "And they are guided (in this world) to goodly speech (i.e. Lâ ilâha illallâh, Alhamdu lillâh, recitation of the Qur'ân, etc.) and they are guided to the Path of Him (i.e. Allâh's religion of Islâmic Monotheism), Who is Worthy of all praises." Fathul-Bary (3/41).
No doubt that mentioning this kind of Dhikr frequently guides to the best of speech and part of it. We ask Allah, the Ever-Generous, of His Bounties.