Umar bin al-khattab reported the Messenger of Allah ﷺ as saying; When the MuadhDHIN says: “Allah is most great, Allah is most great”, and one of you says in response: “Allah is most great”, Allah is most great; then says: “ I testify tht there is no god but Allah”, and he says in response: “I testify that there is no god but Allah”, then say: ” I testify that Muhammad is the Messenger of Allah”, and he makes the response: “ I testify that Muhammad is the Messenger of Allah”, then says: “Come to prayer”, and he makes the response: “There is no might and no power except in Allah”: then says: “ Allah is most great, Allah is most great”, and he makes the response: “Allah is most great”, then says: “There is no god but Allah”, if he says this from his heart, he enter Paradise.
Hadith Referenceسنن ابي داود / كتاب الصلاة / 527
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم (385)
527. Commentary: Entry into Paradise is based solely on affirming the Oneness of Allah (tawhid), the Messengership (risalah), and confirming the Shari‘ah through word and deed. And the adhan encompasses all of these. ➋ The meaning of «لاحول ولا قوة إلابالله» is that avoiding any evil or harm, and attaining any good or righteousness, is not possible without Allah’s help. ➌ This hadith clearly shows the virtue of responding to the adhan; however, in response to «حي على الصلوة» and «حي على الفلاح», one should say «لا حول ولا قوة إلا بالله».
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 527
It is narrated on the authority of Abu Hurairah (RA) that the Messenger of Allah (ﷺ) observed: There has never been a Prophet (ﷺ) amongst the prophets who was not bestowed with a sign amongst the signs which were bestowed (on the earlier prophets). Human beings believed in it and verily I have been conferred upon revelation (the Holy Qur'an) which Allah revealed to me. I hope that I will have the greatest following on the Day of Resurrection.
Shaykh Maulana Abdul Aziz Alvi
Hadith Commentary:Benefits and Issues: (1) By "signs" (ayat) are meant miracles, and a miracle is something contrary to the usual order of things. Human beings, whether individually or collectively, cannot compete with it. The manifestation of a miracle at the hands of a prophet occurs so that people, upon witnessing it, may accept his prophethood. However, this is not within the prophet’s own control. That is why the Prophet (sallallahu alayhi wa sallam) said: "He was given"—that is, the miracle was granted to the prophet. The miracles of the prophets before you were temporary and transitory, because their prophethood was for a limited period. Your (sallallahu alayhi wa sallam) prophethood is until the Day of Resurrection, therefore your miracle is perpetual and enduring, and will remain until the Day of Resurrection.
(2) Your everlasting miracle is the revelation (wahy), whose protection Allah, the Exalted, has guaranteed. And it remains established and preserved even after your departure from this world, because your prophethood endures. Therefore, the number of those who witness this miracle is very great, and thus the number of individuals in your (sallallahu alayhi wa sallam) ummah is also greater than all other communities.
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 385