Allah's ability to accomplish what seems impossible

قَالَ كَذَٰلِكَ قَالَ رَبُّكَ هُوَ عَلَىَّ هَيِّنٌ وَقَدْ خَلَقْتُكَ مِن قَبْلُ وَلَمْ تَكُ شَيْـًٔا

[An angel] said, "Thus [it will be]; your Lord says, 'It is easy for Me, for I created you before, while you were nothing.'"