 <translate> The relevant information is: "Holy, Holy, Holy!" is a Christian hymn written by Reginald Heber (1783 -- 1826).
Therefore, the answer is Reginald Heber. <yor> Ìsọfúnni tó kàn ni pé: "Mímọ́, Mímọ́, Mímọ́!" jẹ́ orin Kristẹni tí Reginald Heber (1783 - 1826) kọ. Nítorí náà, ìdáhùn náà ni Reginald Heber. 