God says
….Shun, then, [all that God has forbidden and, most of all,] the loathsome evil of idolatrous beliefs and practices; shun every word that is untrue,* [inclining] towards God, [and] turning away from all that is false …. Q.22: 30
*I.e., not merely actual, concrete images of false deities but also, in its widest sense, everything that is associated with false beliefs and practices or with a tendency to “worship” false values.
And [know that the true servant of God are only] those who [also] never bear witness to what is false and [who], whenever they pass by [people engaged in] frivolity, pass on with dignity; -- Q.25: 72
And who could be more wicked than he who invents lies about God,* and gives the lie to the truth as soon as it is placed before him! …. Q.39: 32
*Here, the “inventing lies about God” alludes to the attribution of a share in His divinity to anyone or anything beside Him, whether it be a belief in a plurality of deities, or in an imaginary “incarnation” of God in human form.
Prophet said
1. “Whoever persists with falsehood both in speech and action should know that God is not in need of his giving up his food and drink * ” - Bukhari. N: Abu Hurairah.
*I.e., “does not care for his fasting,” the object of performing fast being spiritual conquest by defeating the forces of passion, false talk and judgements, backbiting, blasphemy, slander, curse etc.
