The Hebrew that is translated into English as something like “my firstborn, my might and the beginning of my strength” is translated into Western Lawa as “my first born, born when I was young and strong — like the first fruit of a tree.”
Verse: Gen 49:3
רְאוּבֵן֙ בְּכֹ֣רִי אַ֔תָּה כֹּחִ֖י וְרֵאשִׁ֣ית אוֹנִ֑י יֶ֥תֶר שְׂאֵ֖ת וְיֶ֥תֶר עָֽז׃
Retrieving the verse