ILLIYUN عليون
The seventh stage of celestial bliss. Also the register in which the good deeds of Muslims are said to be written. See Suratu ‘t-Tatfif, lxxxiii. 18: “The register of the righteous is in ‘Illiyun.” See also Mishkat, book v. ch. iii. pt. 3: “The angels follow it (the soul) through each heaven, and the angels of one region pass it on to the next until it reaches the seventh heaven, when God says, ‘Write the name of my servant in ‘Illiyun, and return him to the earth, that is, to his body which is buried in the earth.”
The seventh stage of celestial bliss. Also the register in which the good deeds of Muslims are said to be written. See Suratu ‘t-Tatfif, lxxxiii. 18: “The register of the righteous is in ‘Illiyun.” See also Mishkat, book v. ch. iii. pt. 3: “The angels follow it (the soul) through each heaven, and the angels of one region pass it on to the next until it reaches the seventh heaven, when God says, ‘Write the name of my servant in ‘Illiyun, and return him to the earth, that is, to his body which is buried in the earth.”
Based on Hughes, Dictionary of Islam