seek. search for. Hebrew. bakkesh, especially to seek for blood or life. Compare 2 Samuel 4:11, "require".
went out against them. 2 Samuel 5:17 says "went down to the hold". But this was earlier; for the later command was "thou shalt bestir thyself", which corresponds with the command "Go up" (1 Chronicles 14:10) here, as well as with "thou shalt bestir thyself" of 2 Samuel 5:24.