Albert Barnes Commentary 2 Kings 9:25

"Then said [Jehu] to Bidkar his captain, Take up, and cast him in the portion of the field of Naboth the Jezreelite; for remember how that, when I and thou rode together after Ahab his father, Jehovah laid this burden upon him:" — 2 Kings 9:25 (ASV)

Rode together after Ahab - The Assyrian sculptures make it probable that Josephus was right in interpreting this as “rode side by side behind Ahab in his chariot.” The Assyrian monarchs, when they go out to war, are frequently attended by two guards who stand behind them in the same chariot.

Burden - Compare the use of the same word in Isaiah (Isaiah 13:1; Isaiah 15:1; and so on) and in Lamentations 2:14 for a denunciation of woe.