The word(s) "rightful" appears 21 time(s) in 21 verse(s) in Quran in Muhammad Pickthal translation.

(11) For those who do good is the best (reward) and more (thereto). Neither dust nor ignominy cometh near their faces. Such are rightful owners of the Garden; they will abide therein.

(12) And those who earn ill-deeds, (for them) requital of each ill-deed by the like thereof; and ignominy overtaketh them - They have no protector from Allah - as if their faces had been covered with a cloak of darkest night. Such are rightful owners of the Fire; they will abide therein.

(13) There doth every soul experience that which it did aforetime, and they are returned unto Allah, their rightful Lord, and that which they used to invent hath failed them.

(14) Such then is Allah, your rightful Lord. After the Truth what is there saving error? How then are ye turned away!

(15) Lo! those who believe and do good works and humble themselves before their Lord: such are rightful owners of the Garden; they will abide therein.

(16) And if thou wonderest, then wondrous is their saying: When we are dust, are we then forsooth (to be raised) in a new creation? Such are they who disbelieve in their Lord; such have carcans on their necks; such are rightful owners of the Fire, they will abide therein.

(17) While those who strive to thwart Our revelations, such are rightful owners of the Fire.

(18) They measure not Allah His rightful measure. Lo! Allah is Strong, Almighty.

(19) So the (Awful) Cry overtook them rightfully, and We made them like as wreckage (that a torrent hurleth). A far removal for wrongdoing folk!

(20) Such are rightful owners of the Garden, immortal therein, as a reward for what they used to do.