Laa Hawla Wa Laa Quwwata Illa Billaah

There is neither might nor power except with Allah. We need to say لا حَوْلَ وَلا قُوَّةَ إِلا بِالله Laa Hawla Wa Laa Quwwata Il-la Bil-laah whenever we feel weak or are unable to do anything.

“The Messenger of Allah (ﷺ) Said: ‘Be frequent in saying: Laa ḥawla wa laa quwwata illā billa”. For verily, it is a treasure from the treasures of Paradise”. [Tirmidhi]

Cure for 99 Diseases: 

The Messenger of Allah (ﷺ) Said:  For the person who reads Laa ḥawla wa laa quwwata illā billa, it is a cure for ninety nine(99) diseases, the mildest of which is grief. 
Reference: Mustadrak al hakim hadith 1990
Web Link: http://islam.thestraightwayoflife.com/mustadrak-al-hakim-hadith-1990-cure-for-99-diseases

Abu Musa (R.A) reported: “While we were with Allah’s Messenger (ﷺ) in a holy battle, we never went up a hill or reached its peak or went down a valley but raised our voices with Takbeer. Allah’s Messenger (ﷺ) came close to us and said, “O people! Don’t exert yourselves, for you do not call a deaf or an absent one, but you call the All- Listener, the All-Seer.” The Prophet (ﷺ) then said, “O `Abdullah bin Qais! Shall I teach you a sentence which is from the treasures of Paradise? ( It is): ‘La haula wala quwata illa billah’. (There is neither might nor power except with Allah).” [Sahih Bukhari]

Among the occasions on which this phrase is uttered are the following: 

When turning over at night: 

It was reported that ‘Ubaadah ibn al-Saamit said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘Whoever turns over at night and says Laa ilaaha ill-Allaah wahdahu laa shareeka lah, lahu’l-mulk wa lahu’l-hamd wa huwa ‘ala kulli shay’in qadeer. Al-hamdu-lillaah wa subhaan-Allaah wa laa ilaaha ill-Allaah wa Allaahu akbar, wa laa hawla wa laa quwwata illa Billaah[لا حَوْلَ وَلا قُوَّةَ إِلا بِالله] (There is no god but Allaah Alone, with no partner or associate. To Him belongs praise and His is the sovereignty, and He is Able to do all things. Praise be to Allaah, glory be to Allaah, there is no god but Allaah and Allaah is Most Great. There is no power and no strength except with Allaah), then he says, Allaahumma aghfir li (O Allaah, forgive me), or he makes du’aa’, his prayer will be granted. If he does wudoo’ and prays, his salaah will be accepted.” (Narrated by al-Bukhaari, 1086) 

When the muezzin says “Hayya ‘ala’l-salaah (come to prayer)” or “Hayya ‘ala’l-falaah (come to success)” 

It was narrated from Hafs ibn ‘Aasim ibn ‘Umar ibn al-Khattaab, from his father, that his grandfather ‘Umar ibn al-Khattaab said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘When the muezzin says “Allaahu akbar, Allaahu akbar (Allaah is Most Great),” and one of you says, “Allaahu akbar, Allaahu akbar”; then he says, “Ashhadu an laa ilaaha illa Allaah (I bear witness that there is no god except Allaah” and you say “Ashhadu an laa ilaaha illa Allaah”; then he says, “Ashhadu anna Muhammadan Rasool Allaah (I bear witness that Muhammad is the Messenger of Allaah” and you say, “Ashhadu anna Muhammadan Rasool Allaah”; then he says, “Hayya ‘ala’l-salaah (come to prayer)” and you say, “Laa hawla wa laa quwwata illa Billaah”; then he says, “Hayya ‘ala’l-falaah (come to success)” and you say, “Laa hawla wa laa quwwata illa Billaah(لا حَوْلَ وَلا قُوَّةَ إِلا بِالله)”; then he says “Allaahu akbar, Allaahu akbar,” and you say, “Allaahu akbar, Allaahu akbar”; then he says “Laa ilaaha illa Allaah” and you say, “Laa ilaaha illa Allaah” – if he says that from the heart, he will enter Paradise.’” (Narrated by Muslim in his Saheeh, 578, and by Abu Dawood in his Sunan, 443)

When  leaving one’s house: 

It was narrated that Anas ibn Maalik said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘Whoever says – i.e., when he is leaving his house – “Bismillaah, tawwakaltu ‘ala Allaah, laa hawla wa laa quwwata illa Billaah[لا حَوْلَ وَلا قُوَّةَ إِلا بِالله] (In the name of Allaah, I put my trust in Allaah, and there is no power and no strength except with Allaah),” it will be said to him, “You are taken care of and protected,” and the Shaytaan will leave him alone.’” (Narrated by al-Tirmidhi in his Sunan, 3348. Abu ‘Eesa said, this is a hasan saheeh ghareeb hadeeth which we only know through this isnaad. See Saheeh al-Jaami’ by al-Albaani, 6419. It was also narrated by Abu Dawood in his Sunan (4431), where he adds: “And another shaytaan says to him, ‘What can you do with a man who has been guided, taken care of and protected?’”) 

After praying: 

It was narrated that Abu’l-Zubayr said: “Ibn al-Zubayr used to say immediately after every prayer, when he had said the salaam, ‘Laa ilaaha ill-Allaah wahdahu laa shareeka lah, lahu’l-mulk wa lahu’l-hamd wa huwa ‘ala kulli shay’in qadeer. Laa hawla wa laa quwwata illa Billaah[لا حَوْلَ وَلا قُوَّةَ إِلا بِالله] wa laa na’budu illaa iyyaah. Lahu’l-ni’mah wa lahu’l-fadl wa lahu’l-thanaa’ al-hasan. Laa ilaaha ill-Allaah mukhliseena lahu’l-deena wa law kariha’l-kaafiroon (There is no god but Allaah Alone, with no partner or associate His is the sovereignty and to Him be praise, and He is Able to do all things. There is no power and no strength except with Allaah, and we worship none but Him.From Him (alone) come all blessings and favours, and all good praise is due to Him. There is no god but Allaah and we make our worship purely for Him (alone) however much the disbelievers may hate that).’ He said: ‘The Messenger of Allaah (peace and blessings of Allaah be upon him) used to say these words immediately after every prayer.’” (Narrated by Muslim in his Saheeh, 935)