Alast

07:19 Dec 20, 2020 

Apparently it is referring to wording used in Verse 7:172 of the Qur'an (أَلَسْتُ بِرَبِّكُمْ):
https://quran.com/7/172?translations=20

Also see:
https://ruzealast.com/about/
The term Ruz-e-Alast (as mentioned in the works of Rumi) refers to the day of “Am I not your Lord?” (Alastu bi Rabbikum) when all of the children of our father Adam were made to acknowledge the oneness of their Lord and Creator. This is the day mentioned in the words of Allah Most High, “When thy Lord drew forth from the Children of Adam – from their loins – their descendants, and made them testify concerning themselves, (saying): “Am I not your Lord (who cherishes and sustains you)?”- They said: “Yea! We do testify!” (This), lest ye should say on the Day of Judgment: “Of this we were never mindful”” [7:172]