OET interlinear YHN (JHN) 21:18

uW Translation Notes:

Note 1 topic: figures-of-speech / doublet

ἀμὴν, ἀμὴν, λέγω σοι

(Some words not found in SR-GNT: Ἀμήν ἀμήν λέγω σοί ὅτε ἦς νεώτερος ἐζώννυες σεαυτόν καί περιεπάτεις ὅπου ἤθελες ὅταν δέ γηράσῃς ἐκτενεῖς τάς χεῖρας σοῦ καί ἄλλος ζώσουσιν σέ καί οἴσει ὅπου οὒ θέλεις)

Jesus uses this phrase to emphasize the truth of the statement that follows. See how you translated this phrase in [1:51](../01/51.md).

Note 2 topic: figures-of-speech / metonymy

ἐζώννυες σεαυτὸν & ζώσει σε

˱you˲_˓were˒_girding (Some words not found in SR-GNT: Ἀμήν ἀμήν λέγω σοί ὅτε ἦς νεώτερος ἐζώννυες σεαυτόν καί περιεπάτεις ὅπου ἤθελες ὅταν δέ γηράσῃς ἐκτενεῖς τάς χεῖρας σοῦ καί ἄλλος ζώσουσιν σέ καί οἴσει ὅπου οὒ θέλεις)

Although gird means to put on a belt, Jesus uses it in this verse to refer to putting on clothes. If this might confuse your readers, you could express the meaning plainly. Alternate translation: [you used to dress yourself … will dress you]

Note 3 topic: figures-of-speech / explicit

ἐκτενεῖς τὰς χεῖράς σου

˱you˲_˓will_be˒_stretching_out (Some words not found in SR-GNT: Ἀμήν ἀμήν λέγω σοί ὅτε ἦς νεώτερος ἐζώννυες σεαυτόν καί περιεπάτεις ὅπου ἤθελες ὅταν δέ γηράσῃς ἐκτενεῖς τάς χεῖρας σοῦ καί ἄλλος ζώσουσιν σέ καί οἴσει ὅπου οὒ θέλεις)

Here, stretch out means to extend one’s hands away from one’s sides. This describes the posture of someone who is being crucified. It does not mean that the hands themselves stretch. You could include this information if that would be helpful to your readers. Alternate translation: [you will extend your hands out from your sides]