Answered by Shaykh Umer Mian
I have selected one supplier on a strictly merit basis.
The supplier offered me then some money which I didn’t accept. He still insists on me accepting this money because he is very happy to get this order.
Please tell me if it is a bribe and shall or not I accept this money?
Answer: Wa alaikum as-salam wa rahmatullahi wa barakatuhu
Please read this answer for a detailed explanation of the fiqh of bribes.
The passage that specifically covers your situation is the following:
“And if he saw to the persons need without any condition or greed for anything in return and was in return presented with a gift, this is permissible for him to take and there is no harm in it, and what is related from Ibn Mas’ud concerning the dislike of such a gift is but scruples.”