Genesis; chapter 28 verse 12 It's the story of how Jacob had a dream in which he saw angels going up and down a ladder (or staircase; take your pick of the translations; personally I see it as a pair of escalators like in a big store ). God was at the top of it. The dream was interpreted by Jacob as meaning that he would be forgiven by his own father for deceiving him. He'd pretended to be his own twin brother; his father was blind and was conned into giving his blessing to the wrong lad. Now read on......
( It's also the name of a plant with leaflets in a ladder shape; polemonium caeruleum, apparently )