LXX Job 9:8
5 It is he who wears down mountains—they do not know it— who overturns them in anger, 6 who shakes the earth under heaven off its foundation, and its pillars quake, 7 who speaks to the sun and it does not rise— concerning the stars, he seals them up; concerning his messengers, he thought them a bit crooked— 8 who stretched out the heavens alone, and walks about upon the sea as upon the ground, 9 who made Pleiades and Hesperus and Bear and the chambers of the south winds, 10 who does great and inscrutable things, both glorious and extraordinary, which cannot be numbered. 11 If he should pass over me, I would not notice, and if he should pass by me, likewise I would not perceive.
Mark 6:45
45 Immediately Jesus made his disciples get into the boat and go on ahead to the other side, to Bethsaida, while he dispersed the crowd. 46 After saying goodbye to them, he went to the mountain to pray. 47 When evening came, the boat was in the middle of the sea and he was alone on the land. 48 He saw them straining at the oars because the wind was against them. As the night was ending, he came to them walking on the sea, for he wanted to pass by them. 49 When they saw him walking on the water they thought he was a ghost. They cried out, 50 for they all saw him and were terrified. But immediately he spoke to them: “Have courage! It is I. Do not be afraid.”
Notes and References
"... There is, however, at least one Old Testament passage that paints a picture prefiguring Mark’s sea-walking story: a doxological passage in Job, portraying God as sovereign over all creation, acclaims him as the one “who alone stretched out the heavens and trampled the waves of the sea” (Job 9:8). In its original context, this text was probably meant as another reference to God’s subduing the primordial watery chaos; but the LXX offers a rendering of Job 9:8 that may be of considerable importance for understanding Mark 6:45-52 ... If Mark had Job 9 in mind, it would help to explain another notoriously puzzling feature of the water-walking tale. In Mark’s telling of the story, when Jesus comes walking on the sea, the narrator comments cryptically, “He intended to pass them by” ... If we recognize the allusion to Job 9, however, we may glimpse a far more illuminating reading. Thus, in Job 9 the image of God’s walking on the sea is linked with a confession of God’s mysterious transcendence of human comprehension ..."
Hays, Richard B. Echoes of Scripture in the Gospels (p. 97) Baylor University Press, 2017