[5:111] "And when I revealed to the disciples, saying, Believe in Me and My apostle, they said: We believe and bear witness that we submit (muslimoon)."

[2:131] "When his Lord said to him(Abraham), Be a Muslim, he said: I submit myself to the Lord of the worlds."

[2:132] "And the same did Ibrahim enjoin on his sons and (so did) Yaqoub. O my sons! surely Allah has chosen for you (this) faith, therefore die not unless you are Muslims."

[3:52] "But when Isa perceived unbelief on their part, he said Who will be my helpers in Allah's way? The disciples said: We are helpers (in the way) of Allah: We believe in Allah and bear witness that we are Muslims."

[3:67-8] "Ibrahim was not a Jew nor a Christian but he was (an) upright (man), a Muslim, and he was not one of the polytheists. Most surely the nearest of people to Ibrahim are those who followed him and this Prophet and those who believe and Allah is the guardian of the believers."

[49:14] "The arabs say: we believe. Say (unto them): Ye believe not, but rather say: we have become Muslims, for the faith has not yet entered into your hearts. Yet if ye obey Allah and His messenger, He will not withold from you aught of the reward of your deeds. Lo! Allah is forgiving, merciful."

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Here is a reminder that the Muslims (believers) should not become like ones before them:

[57:16] "Has not the Time arrived for the Believers that their hearts in all humility should engage in the remembrance of Allah and of the Truth which has been revealed (to them), and that they should not become like those to whom was given Revelation aforetime, but long ages passed over them and their hearts grew hard? For many among them are rebellious transgressors."