The Messenger of Allah ﷺ said, "The lowest place any of you will occupy in Paradise is that he will be told, 'Wish,' and he will make his wish. Then he will be asked, 'Have you made your wish?' He will say, 'Yes.' Then he will be told, 'You shall have what you wished for, and the like of it along with it.'"
وقال رسول الله ﷺ إن أدنى مقعد أحدكم من الجنة أن يقول تمن ويتمنى فيقول له هل تمنيت فيقول نعم فيقول له فإن لك ما تمنيت ومثله معه
This is a sahih hadith. It appears in the Individual Sahifah under number 55. Muslim also related it [1:114/11k 65-66 Bulaq], through the route of the Sahifah. Bukhari did not relate it through the route of the Sahifah nor with this wording, although its meaning is established within a lengthier hadith, which has already appeared in the Musnad at 7703 and 7914, and was related by the two sheikhs and others.In the Individual Sahifah there occurs the addition, "the lowest seat of any of you in Paradise is that it be his." This addition, "that it be his," is not found in any of the manuscripts of the Musnad, nor in Jami al-Masanid, nor in Sahih Muslim. It is an anomalous wording, and I consider it most likely to be an error on the part of some of the narrators or copyists.