To be throughout the night (διανυκτερεύω dianyktereuō)

And it happened that, in those days, He went out to a mountain to pray. And He was in the prayer of God throughout the night. (Lk 6:12)

Ἐγένετο δὲ ἐν ταῖς ἡμέραις ταύταις ἐξελθεῖν αὐτὸν εἰς τὸ ὄρος προσεύξασθαι, καὶ ἦν διανυκτερεύων ἐν τῇ προσευχῇ τοῦ θεοῦ.

Factum est autem in illis diebus, exiit in montem orare, et erat pernoctans in oratione Dei.

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