en_tn/jer/40/09.md

took an oath to them

"swore to the Judean commanders"

Look

"Listen carefully" or "Pay attention"

summer fruit

"fruit that becomes ripe during the summer"

you have occupied

"you have taken over." "Occupy" here is a military term. Gedaliah was talking to soldiers (Jeremiah 40:7) who may have conquered or otherwise taken control of cities.