en_tn_lite_do_not_use/job/38/38.md

when the dust runs ... tightly together?

The rhetorical question that begins with the words "Who can pour out" in verse 37 ends here. "Only I can pour out ... when the dust runs ... tightly together." (See: rc://en/ta/man/translate/figs-rquestion)

when the dust runs into a hard mass

The rain makes the loose dry dirt stick together like one piece of dirt. This can be stated in active form. Alternate translation: "when the rain molds the dirt into a hard mass" (See: rc://en/ta/man/translate/figs-activepassive)

the clods of earth clump tightly together

"the lumps of soil stick together"