Riyad as-Salihin 17:173

Abu Hurairah (May Allah be pleased with him) said:

The Messenger of Allah (ﷺ) said, "The Almighty Allah said: 'Who is more an oppressor than him who goes to create like My creation? Let him make an ant or a grain of corn or a grain of barley."' [Al-Bukhari and Muslim] .