Hisgalus 14:3-5 Orthodox Jewish Bible (OJB)
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).
4 These are those who with nashim (women) are not tameh (unclean, defiled), bochrim ki betullim they are, for these are the ones following the SEH (Lamb, SHEMOT 12:3; YESHAYAH 53:7 Moshiach) wherever he goes. These chasidim had the Geulah price paid for their redemption [VAYIKRA 25:50, 51; YESHAYAH 61:2], the ones having been purchased from Bnei Adam as the bikkurim (firstfruits) to Hashem and to the SEH (Lamb, YESHAYAH 53:7). [YIRMEYAH 2:3]