if thou knowest # 01_GEN_47_06 # The land of Egypt [is] before thee; in the best of the land make thy father and brethren to dwell; in the land of Goshen let them dwell: and if thou knowest [any] men of activity among them, then make them rulers over my cattle. 
if thou knowest # 18_JOB_38_05 # Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it? 
if thou knowest # 18_JOB_38_18 # Hast thou perceived the breadth of the earth? declare if thou knowest it all.