´It was narrated that Abu Hurairah said:` "The Messenger of Allah forbade Ash-Shighar." (One of the narrators) 'Ubaidullah said: "Ash-Shighar means when a man gives his daughter in marriage on condition that (the other man) gives him his sister in marriage."
Related hadith on this topic
Explanation & Benefits
Hafiz Muhammad Ameen
"This 'his sister' is merely an example; otherwise, if the condition of marriage pertains to anyone—whether it is a daughter, a sister, a niece (brother's daughter), or a niece (sister's daughter), etc.—there is no difference."
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 3340