The word(s) "both" appears 58 time(s) in 56 verse(s) in Quran in Abdullah Yusuf Ali translation.

(41) Then, when he decided to lay hold of the man who was an enemy to both of them, that man said: "O Moses! Is it thy intention to slay me as thou slewest a man yesterday? Thy intention is none other than to become a powerful violent man in the land, and not to be one who sets things right!"

(42) He said: "We will certainly strengthen thy arm through thy brother, and invest you both with authority, so they shall not be able to touch you: with Our Sign shall ye triumph,- you two as well as those who follow you."

(43) How many are the creatures that carry not their own sustenance? It is Allah who feeds (both) them and you: for He hears and knows (all things).

(44) And among His Signs, He shows you the lightning, by way both of fear and of hope, and He sends down rain from the sky and with it gives life to the earth after it is dead: verily in that are Signs for those who are wise.

(45) When Our Signs are rehearsed to such a one, he turns away in arrogance, as if he heard them not, as if there were deafness in both his ears: announce to him a grievous Penalty.

(46) Do ye not see that Allah has subjected to your (use) all things in the heavens and on earth, and has made his bounties flow to you in exceeding measure, (both) seen and unseen? Yet there are among men those who dispute about Allah, without knowledge and without guidance, and without a Book to enlighten them!

(47) So when they had both submitted their wills (to Allah), and he had laid him prostrate on his forehead (for sacrifice),

(48) We will, without doubt, help our messengers and those who believe, (both) in this world's life and on the Day when the Witnesses will stand forth,-

(49) Or He bestows both males and females, and He leaves barren whom He will: for He is full of Knowledge and Power.

(50) We have enjoined on man kindness to his parents: In pain did his mother bear him, and in pain did she give him birth. The carrying of the (child) to his weaning is (a period of) thirty months. At length, when he reaches the age of full strength and attains forty years, he says, "O my Lord! Grant me that I may be grateful for Thy favour which Thou has bestowed upon me, and upon both my parents, and that I may work righteousness such as Thou mayest approve; and be gracious to me in my issue. Truly have I turned to Thee and truly do I bow (to Thee) in Islam."