Hisgalus 14:1-3

Orthodox Jewish Bible

14 And I looked, and, hinei, the SEH (Lamb, SHEMOT 12:3; YESHAYAH 53:7 Moshiach) having taken his stand on Mount Tziyon and with him the 144,000 having ha-Shem of him and ha-Shem of HaAv of him which had been written on their metsakhim (foreheads). [YECHEZKEL 9:4]

² And I heard a sound out of Shomayim as a sound of mayim rabbim (many waters) and as a sound of ra’am gadol (loud thunder), and the sound which I heard was as of players of the nevel playing on their nevalim (harps).

³ And they sing, as it were, a Shir Chadash (New Song) before the Kes (Throne) and before the Arbah Chayyot (four living beings) and before the Zekenim (Elders, Ex 12:21), and no one was being able to learn the Shir (Song) except the 144,000, the ones for whom the Geulah price had been paid for their redemption [Lv 5:5-6; Ex 13:13], the ones having been redeemed (purchased) from ha’aretz (the earth).