What is a relinquishment deed in blood relation?

Respected advocates, We are family of three - my mother , me and my younger brother. lost my father in 2003. Executed family partition deed with my father’s elder brother, where we three became joint (1/3 each) owners of a property. Along with family partition deed, as per my late father’s and late grandfather’s wish of giving same property to my mother 100%, we both brothers relinquished rights in name of my mother. That relinquishment deed had a sentence “ Me and my brother and our successors have no right of any kind on the said property.” Can we get the same property back when mother dies with or without will as legal heirs or we just lost succession rights due to poor drafting/our limited understanding at that time.