A ---Allah the Almighty says: (But you cannot will, unless Allah wills). (Al-Insan, 30)
Allah the Almighty says: {And never say of anything, "I shall do such and such thing tomorrow." Except (with the saying), "if Allah will!"}. ()
Allah the Almighty says: {Allah sends astray whom He wills and He guides on the Straight Path whom He wills}. (Al-An' am, 39)
Allah the Almighty says: {And had Allah willed, He could have made you (all) one nation}. (Al-Ma'idah, 48 & An-Nahl, 93)
Allah the Almighty says: {And if Allah had willed, He could have made them one nation}. (Ash-Shura, 8)
Allah the Almighty says: {But if it had been Allah's Will, He Himself could certainly have punished them (without you)}. (Muhammad, 4)
Allah the Almighty says: {(He is the) Doer of whatsoever He intends (or wills)}. (Al-Buruj, 16)
Allah the Almighty says: {Verily, His Command, when He intends a thing, is only that He says to it, 'Be!" - and it is!}. (Ya-Sin, 82)
Allah the Almighty says: {Verily! Our Word unto a thing when We intend it, is only that We say unto it: "Be!" - and it is!}. (An-Nahl, 40)
Allah the Almighty says: {And whomsoever Allah wills to guide, He opens his breast to Islam,. and whomsoever He wills to send astray, He makes his breast closed and constricted, as if he is climbing up to the sky}. (Al-An'am, 125)
'Abdullah Ibn 'Amr Ibn Al-'As (May Allah be pleased with them) reported that he heard Allah's Messenger (Peace be upon him) as saying: "Verily, the hearts of all the sons of Adam are between the two fingers out of the fingers of the Compassionate Lord as one heart. He turns that to any (direction) He likes. Then Allah's Messenger (Peace be upon him) said: 0
Allah! The Turner of the hearts, turn our hearts to Thine Obedience.” (Sahih Muslim)
Narrated' Abdullah Ibn Abu Qatadah (May Allah be pleased with him): My father said: "One night we were traveling with the Prophet (Peace be upon him) and some people said: 'We wish that Allah's Messenger would take a rest along with us during the last hours of the night.’ He said: 'I am afraid that you will sleep and miss the (Fajr) prayer.’ Bilal said: 'I will make you get up,’ So all slept and Bilal rested his back against his Rahila (riding-camel) and he too was overwhelmed (by sleep) and slept. The Prophet (Peace be upon him) got up when the edge of the sun had risen and said: 'O Bilal! What about your statement?' He replied, 'I have never slept such a sleep. ‘The Prophet (Peace be upon him) said: 'Allah captured your souls when He wished, and released them when He wished.
0 Bilal! Get up and pronounce the Adhan (the call to prayer) for the prayer.’ The Prophet (Peace be upon him) performed ablution and when the sun came up and became bright, he stood up and prayed.” (Bukhari and Muslim)
Narrated Abu Musa (May Allah be pleased with him): Whenever a beggar or a person in need of something came to the Prophet (Peace be upon him), he used to say (to his companions), "Intercede (for him) and you will be rewarded for that, and Allah will fulfill what He will through His Messenger's tongue.” (Bukhari and Muslim)
Narrated Mu' awiyah (May Allah be pleased with him): I heard Allah's Messenger saying, "If Allah wants to do good to a person, He makes him comprehend the religion. I am just a distributor, but the grant is from Allah. (And remember) that this nation (true Muslims) will keep on following Allah's teachings strictly and they will not be harmed by any one going on a different path till Allah's Order (Day of Judgment) is established.” (Bukhari and Muslim)
Abu Musa (May Allah be pleased with him) reported Allah's Messenger (Peace be upon him) as saying: When Allah, the Exalted and Glorious, intends to show mercy to an Ummah from amongst His servants He calls back His Messenger to his eternal home and makes hima harbinger and recompense in the world to come; and when He intends to cause destruction to an Ummah, He punishes it while its Messenger is alive and He destroys it as he (the Messenger) witnesses it and he cools his eyes by destruction as they had belied him and disobeyed his command.” (Sahih Muslim)
Reference: 200 FAQ On Muslims Belief - Shiekh Hafiz Ibn Ahmed Al Hakami