51:49
وَمِن كُلِّ شَىْءٍ خَلَقْنَا زَوْجَيْنِ لَعَلَّكُمْ تَذَكَّرُونَ
wamin kulli shayin khalaqnā zawjayni laʿallakum tadhakkarūna
and We created pairs of all things so that you [people] might take note.
And of everything We have created pairs, that you may remember (the Grace of Allâh).