Melachim Alef 22:4

4 And he said unto Yehoshaphat, Wilt thou go with me to battle to Ramot-Gil`ad? And Yehoshaphat said to the Melech Yisroel, I am as thou art, my people as thy people, my susim as thy susim.

Melachim Alef 22:4 Meaning and Commentary

Ver. 4 And he said unto Jehoshaphat, wilt thou go with me to battle
to Ramothgilead?
&c.] This affair being lately canvassed at the council board, and very much on Ahab's mind, he puts this question to Jehoshaphat, his visitor, relation, and ally; wisely considering that his own forces were small, and that to have such an auxiliary might be of great advantage to him:

and Jehoshaphat said to the king of Israel, I am as thou art, my people
as thy people, my horses as thy horses;
meaning, that he and his soldiers, foot and horse, were at his service.

Melachim Alef 22:4 In-Context

2 And it came to pass in the third year, that Yehoshaphat Melech Yehudah came down to Melech Yisroel.

3 And Melech Yisroel said unto his avadim, Know ye that Ramot-Gil‘ad is ours, and we hesitate, and take it not out of the hand of HaMelech Aram?

4 And he said unto Yehoshaphat, Wilt thou go with me to battle to Ramot-Gil`ad? And Yehoshaphat said to the Melech Yisroel, I am as thou art, my people as thy people, my susim as thy susim.

5 And Yehoshaphat said unto the Melech Yisroel, Inquire for the Devar Hashem today.

6 Then the Melech Yisroel gathered the nevi’im together, about 400 men, and said unto them, Shall I go against Ramot-Gil‘ad to battle, or shall I refrain? And they said, Go up; for Hashem shall deliver it into the hand of HaMelech.