ٱللَّهُ ٱلَّذِى خَلَقَكُم مِّن ضَعۡفٍ ثُمَّ جَعَلَ مِن بَعۡدِ ضَعۡفٍ قُوَّةً ثُمَّ جَعَلَ مِن بَعۡدِ قُوَّةٍ ضَعۡفًا وَشَيۡبَةً ۚ يَخۡلُقُ مَا يَشَآءُ ۖ وَهُوَ ٱلۡعَلِيمُ ٱلۡقَدِيرُ
It is Allah Who created you in a state of (helpless) weakness, then gave (you) strength after weakness, then, after strength, gave (you weakness and a hoary head: He creates as He wills, and it is He Who has all knowledge and power.<br/>
God is the One Who created you from [a state of] weakness, [from] a 'base fluid' [cf. Q. 32:8], then He ordained after, a second, weakness, which is the weakness of [the period of] childhood, strength, that is, the strength of youth, then after strength He appointed weakness [again] and grey hair, the weakness of old age and the grey hairs of decrepitude (read [vocalised as] du'f, 'weakness', in all three places). He creates what He will, of weakness and strength, youth and grey hairs, and He is the Knower, of how to manage His creatures, the Omnipotent.