"Listen carefully" or "What I am about to say is important." You could use a word in your language that tells the hearer to listen carefully. The speaker now discovers the answer to the question in verse 6.
# it is the bed
This refers to a bed with a cover that can be carried from one place to another.
These two phrases refer to the same sixty people. The second phrase clarifies that the "warriors" are "mighty men of Israel." (See: [[rc://en/ta/man/translate/figs-doublet]])