A.T. Robertson Commentary 2 Peter 1:14

"knowing that the putting off of my tabernacle cometh swiftly, even as our Lord Jesus Christ signified unto me." — 2 Peter 1:14 (ASV)

The putting off of my tabernacle (η αποθεσις του σκηννωματος μου). For αποθεσις see on 1 Peter 3:21 and for σκηνωμα verse 13. For the metaphor see 2 Corinthians 5:3f.

Cometh swiftly (ταχινη εστιν). Late adjective (Theocritus, LXX, inscription), in N.T. only here and 2:1. It is not clear whether ταχινος means soon or speedy as in Isa 59:7 and like ταχυς in Jas 1:19, or sudden, like ταχυς in Plato (Republ. 553 D). Either sense agrees with the urgent tone of Peter here, whether he felt his death to be near or violent or both.

Signified unto me (εδηλωσεν μο). First aorist active indicative of δηλοω, old verb (from δελος), as in 1 Peter 1:11. Peter refers to the incident told in Joh 21:18f. , which he knew by personal experience before John wrote it down.