Luke 12:38

And if he shall come in the second watch, or come in the third watch, and find them so, blessed are those servants.

They will be blessed if he comes in the second or third watch, and finds them so.

And if he shall come in the second watch, and if in the third, and find `them' so blessed are those `servants'.

and if he may come in the second watch, and in the third watch he may come, and may find `it' so, happy are those servants.

Even if he comes in the second or third watch of the night and finds them alert, those servants will be blessed.