Detailed declaration of faith is, “I believe in Allah and His Angels, His Books and His Messengers, and the Day of Judgement and that all good and evil and fate is from Almighty Allah and it is sure that there will be resurrection after death.”
Say, “He is the Most Merciful; we have believed in Him, and upon Him we have relied. And you will [come to] know who it is that is in clear error.” [Al-Quran 67:29]
“And then being among those who believed and advised one another to patience and advised one another to compassion.” [Al- Quran 90:17]
Meaning, he was from the believers who worked righteous deeds, and advised each other to be patient with the harms of the people, and to be merciful with them.
“Indeed, those who have believed and done righteous deeds will have gardens beneath which rivers flow. That is the great attainment.” [Al- Quran 85:11]
“O you who have believed, repent to Allah with sincere repentance. Perhaps your Lord will remove from you your misdeeds and admit you into gardens beneath which rivers flow [on] the Day when Allah will not disgrace the Prophet and those who believed with him. Their light will proceed before them and on their right; they will say, “Our Lord, perfect for us our light and forgive us. Indeed, You are over all things competent.”” [Al-Quran 66:8]
“The believers are only those who, when Allah is mentioned, their hearts become fearful, and when His verses are recited to them, it increases them in faith; and upon their Lord they rely. The ones who establish prayer, and from what We have provided them, they spend. Those are the believers, truly. For them are degrees [of high position] with their Lord and forgiveness and noble provision.” [Al-Quran 8:2-4]