every year, or just once

‏‏‎Mohsin Hasan Mumtaz‎‏ مع ‏‎Neri Mohammad‎‏ و‏اصليني مكاوروغ‏‏.

‏11 أبريل، 2016‏، الساعة ‏08:52 م‏ · 

It was narrated from Ibn ‘Abbas that Aqra’ bin Habis asked the Prophet Muhammad ﷺ: “O Messenger of Allaah, is Hajj (required) every year, or just once” He said: “Rather it is just once. And whoever can perform Hajj voluntarily, let him do so.”

Grade : Sahih (Darussalam)
English reference : Vol. 4, Book 25, Hadith 2886
Arabic reference : Book 25, Hadith 2997