The word(s) "mayest" appears 16 time(s) in 14 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) Thou mayest defer (the turn of) any of them that thou pleasest, and thou mayest receive any thou pleasest: and there is no blame on thee if thou invite one whose (turn) thou hadst set aside. This were nigher to the cooling of their eyes, the prevention of their grief, and their satisfaction - that of all of them - with that which thou hast to give them: and Allah knows (all) that is in your hearts: and Allah is All-Knowing, Most Forbearing.

(12) In order that thou mayest admonish a people, whose fathers had received no admonition, and who therefore remain heedless (of the Signs of Allah).

(13) Thus have We sent by inspiration to thee an Arabic Qur'an: that thou mayest warn the Mother of Cities and all around her,- and warn (them) of the Day of Assembly, of which there is no doubt: (when) some will be in the Garden, and some in the Blazing Fire.

(14) 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."