Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
Note 10 at Ac 2:24: The Greek word translated "pains" here is "ODIN," and it means "birth pang" (Strong's Concordance). This same word was translated "travail" in 1Th 5:3 and clearly refers to the birth pangs of a woman in labor.
Note 11 at Ac 2:24: It had to be possible for Jesus to suffer defeat or else He would not have been a true "last Adam" (1Co 15:45) who "was in all points tempted like as we are, yet without sin" (Heb 4:15). However, Jesus' possibility of sin was linked to His physical body and its frailties. Once He had proved Himself faithful while in His mortal flesh, there was no way He could be overcome when He met the devil in the spiritual realm.