The Companies - 39:38 "If you ask them, "Who created the heavens and the earth?"they will say, "Allah". Say, "What about those whom you serve besides Allah? If Allah wills harm for me, can they remove His harm? Or if He wills mercy for me, can they keep His mercy? Say, "Allah is sufficient for me."Let those who trust put their trust in Him"
It is ingratitude to Allah to take some gods besides Him and serve them, when Allah is the One Who has given everything we know at our command:
The Cow/2:22 He has made the earth habitable for you and made the heaven a structure. He has sent down water from the sky and brought forth from it various crops for you as sustenance. Do not knowingly associate partners with Allah.

The Cattle/6:14 "Say: "Shall I take other masters besides Allah, Who created the heavens and the earth out of nothing, Who feeds but does not feed?""Say: "I have been commanded to submit before anyone else. Do not associate partners!"

The Criterion/25:45 Have you noticed how your Lord lengthens the shadow? Had He willed, He could have made it motionless. Indeed, We made the sun a proof for it (We made the existence of the shadow dependent on the light).
The Criterion/25:46 Then We gradually take it away.
The Criterion/25:47 And He it is Who has made the night a covering for you, and sleep a rest, and the day a time of resurrection.
The Criterion/25:48 And He it is Who sends the winds as heralds before His mercy. And We send down from the sky pure water.
The Criterion/25:49 That We may revive with it a dead land and water with it livestock and people whom We have created.
The Criterion/25:50 And We scattered it among them that they may take admonition. But most of the people persist in ingratitude.

The Bee/16:54 But when He removes that distress from you, a group of you immediately begin to associate partners with their Lord,
The Bee/16:55 Ungrateful for what they were given Enjoy yourselves; soon you will surely know!

The Night Journey/17:67 If any distress touches you in the ocean, those whom you call upon besides Him are lost. But when He saves you and brings you ashore, you return. Man is ungrateful

The Spider/29:65 When they board the ship, they call upon Him, making the religion belong to Allah alone. But when We deliver them from the sea, they start associating partners again.
The Spider/29:66 Let them be ungrateful for what We have given them and enjoy themselves. They will know in the future.

The Romans/30:33 On the Day when the people are afflicted, they turn to their Lord in prayer. But then, when they taste a mercy, some of them associate partners with their Lord.
The Romans/30:34 So they are ungrateful for what We have given them. So enjoy yourselves; you will know in the future.

The Companies/39:3 "Indeed, to Allah alone belongs religion. Those who take those other than Him as awliya (friends) say: "We serve them so that they may bring us closer to Allah". Allah will decide between them in that in which they differ. Surely Allah guides not the liars and the ungrateful."

The Forgiver/40:42 You call me to be ungrateful to Allah and to associate with Him that of which I have no knowledge. I call you to Him Who is the Exalted and the Forgiving.
The Forgiver/40:43 Surely what you call me to has no foundation in this world or the Hereafter. To Allah is our return. Those who transgress will end up in Hell.

The Ornaments of Gold/43:15 They set aside some of their servants as a portion for Him. Indeed man is a manifest ingrate.
The Ornaments of Gold/43:16 Has He reserved for Himself daughters from among His creatures, but has He chosen sons for you?

The Heights/7:189 "He created you from a single soul (with the same genetic characteristics). And from him He created his mate so that he might find rest. When he approached his mate, he loaded her with a light burden and traveled with her. When his burden became heavy, they both begged their Lord, Allah: "If you give us a perfect child, we shall be among the thankful."
The Heights/7:190 When He gave them a perfect child, they began to associate partners with Him for this gift He had given them. Allah is far greater than all that they associate partners with.
The Heights/7:65 "And We sent to the people of Ad their brother Hud, saying: "My people, worship Allah. You have no god but Him. Will you not be righteous?"

The Poets/26:131 You should listen to Allah and follow me.
The Poets/26:132 Listen to the One who gave you all that you know.