Jamieson, Fausset and Brown on Isaiah 65:6

6. written before me--"it is decreed by Me," namely, what follows (Job 13:26), [Maurer]; or, their guilt is recorded before Me (compare Da 7:10; Re 20:12; Mal 3:16).

into ... bosom--(Psa 79:12; Jr 32:18; Lu 6:38). The Orientals used the loose fold of the garment falling on "the bosom" or lap, as a receptacle for carrying things. The sense thus is: I will repay their sin so abundantly that the hand will not be able to receive it; it will need the spacious fold on the bosom to contain it [Rosenmuller]. Rather it is, "I will repay it to the very person from whom it has emanated." Compare "God did render the evil of the men of Shechem upon their heads" (Jud 9:57; Psa 7:16) [Gesenius].