BT Šab 65b(6) :נהרא מכיפיה מתבריך‏ : a river is blessed from its banks
See the entire entry for brk vb. to bow; D to bless

BT Šab 65b(6) :נהרא מכיפיה מתבריך‏ : a river is blessed from its banks [i.e. from water which flows into it from tributaries and not from rain]
See the entire entry for kēp̄, kēp̄ā n.m. shore