Faith

Quran

1. Surah Al-Ikhlas (112:1-4) "Say, 'He is Allah, [Who is] One, Allah, the Eternal Refuge. He neither begets nor is born, Nor is there to Him any equivalent.'"
2. Surah Al-Baqarah (2:163) "And your god is one God. There is no deity [worthy of worship] except Him, the Entirely Merciful, the Especially Merciful."
3. Surah Al-Ankabut (29:46) "And do not argue with the People of the Scripture except in a way that is best, except for those who commit injustice among them, and say, 'We believe in that which has been revealed to us and revealed to you. And our God and your God is one; and we are Muslims [in submission] to Him.'"
4. Surah Al-Ikhlas (42:11) "There is nothing like unto Him, and He is the Hearing, the Seeing."

Vedas

1. Rigveda 1.164.46 "Ekam sat vipra bahudha vadanti" - "Truth is one, the wise call it by many names."
2. Yajurveda 32.3 "na tasya pratima asti" - "There is no image of Him."
3. Atharvaveda 13.4.16 "He is One, He is without any form, colorless, and universal."
4. Chandogya Upanishad 6.2.1 "Ekam evadvitiyam" - "He is one only without a second."

These verses from the Quran and the Vedas strongly convey the concept of monotheism, highlighting the belief in one, singular, and supreme God.