Great searchings - (thoughts, Judges 5:15) of heart Deborah means to say that at first the Reubenites made magnanimous resolutions to help their brethren against Jabin. But they stayed at home, and let the opportunity slip.

Why abodest thou among the sheepfolds, to hear the bleatings of the flocks?.... This tribe abounded with flocks and herds, and therefore chose the country on the other side Jordan, as suitable for them; and now, at this critical juncture, they judged it wisest, and their best policy, to abide by them, and the care of them; lest by intermeddling, should Jabin prevail, he might be provoked to fall upon them, and take them from them; wherefore the bleatings of their flocks, and the whistlings of the shepherds that kept them, sounded louder in their ears, and more engrossed their attention, than the groans and cries of Israel under oppression; or than the soundings of the trumpet, the alarm of war, or the loud calls of Deborah and Barak; being under the influence of a carnal worldly spirit, and wanting affection and sympathy towards their brethren, about which Deborah here expostulates with them:
for the divisions of Reuben there were great searchings of heart; this is repeated to show how much the prophetess, the general of the army, the princes and people, were affected with this conduct of the tribe of Reuben; it gave them much pain and uneasiness, occasioned many inquiries, caused much discourse and conversation, and put them upon thinking, and greatly exercised their minds, what should be the meaning of their behaving after this manner. Cocceius takes these words to be spoken ironically, and renders them,"at the rivers of Reuben were great men in searchings of heart;''there were wisdom, prudence, counsel, searching, and discerning of spirits, preferring their flocks to the people of God.

Why abodest - Why wast thou so unworthy and cowardly, that thou wouldest not engage thyself in so just, so necessary, and so noble a cause, but didst prefer the care of this sheep, and thy own ease and safety, before this generous undertaking? Reuben thought neutrality their wisest course; being very rich in cattle, Numbers 32:1. They were loath to run the hazard of so great a loss, by taking up arms against so potent an enemy as Jabin: and the bleatings of their sheep were so loud in their ears, that they could not hear the call of Deborah and Barak.