Islam
"Say He is God, The One and only, Gid, the Eternal, Absolute. He begets not, nor is He begotten. And there is none like unto Him." (Quran 112: 1-4)

Now they prove, that Islam is the truth

Christianity
"Hear, O Israel, The Lord Our God is One God" (Deutronomy 6:4) (Mark 12:29)

Hinduism
"Ekam evadvitiyam"
"He is One only without a second" (Chandogya Upanishad 6:2:1)

"Na casya kascij janita na cadhipah."
"Of Him there are neither parents nor lord." (Svetasvatara Upanishad, 6:9)

"Na tasya pratima asti."
"There is no image of Him." (Yajurveda 32:3)

"Andhatama pravishanti ye asambhuti mupaste."
"They enter darkness, those who worship the natural elements." (Air, water, fire, etc.)
"They sink deeper in darkness, those who worship sambhuti." (created things; table, chair, idol etc.)." (Yajurveda 40:9)

Brahma Sutra of Hinduism:
"Ekam Brahm, dvitiya naste neh na naste kinchan"
"There is onlye one Gid, not the second;
Not at all, not at all, not in the least bit."