Exegesis:

egeneto de ‘and it happened,’ cf. on 1.8.

meta tous logous toutous ‘after these sayings,’ i.e. ‘after he had said this’ (cf. An American Translation), rather than, ‘after these things’ (Klostermann). logous refers to vv. 23-27 as a whole.

hosei hēmerai oktō ‘about eight days,’ i.e. ‘about a week’ on the basis of Roman time-reckoning, and equivalent to Mk. 9.2, ‘after six days,’ on the basis of Jewish time-reckoning, cf. Grundmann. For the nominative of time.

[kai] paralabōn ‘taking with him,’ cf. on v. 10.

eis to oros lit. ‘to the mountain,’ but cf. on 6.12.

Translation:

About eight days after, see also on 1.59.

He took with him … and went up …. The main event is mentioned in the second clause. Therefore, it may be preferable to subordinate the first clause (Bible de Jérusalem, prenant … il gravit la montagne), and/or to shift it to the end of the verse, e.g. ‘Jesus went up…, accompanied by (or, together with) his disciples.’

Went up on the mountain, i.e. ‘went up into the mountains/hills,’ see on 6.12.

Quoted with permission from Reiling, J. and Swellengrebel, J.L. A Handbook on the Gospel of Luke. (UBS Handbook Series). New York: UBS, 1971. For this and other handbooks for translators see here . Make sure to also consult the Handbook on the Gospel of Mark for parallel or similar verses.