The Messenger of Allah (may Allah’s peace and blessings be upon him) allowed temporary marriage for three nights in the year of the battle of Awtās, then he forbade it

Allah, the Almighty, prescribed marriage for the purpose of unity, survival, affability, and building a family. Hence, any condition or intent contradicting such a rationale is invalid. Accordingly, temporary marriage is forbidden. The Messenger of Allah (may Allah’s peace and blessings be upon him) allowed temporary marriage over three nights only in the year of the battle of Awtās (Shawwāl, in the year 8 AH) out of necessity, then he forbade it eternally given the evil consequences that it involves. Reasons for prohibiting temporary marriage in Islam include: 1. Mixing up of lineages. 2. Subjecting people's private parts to renting. 3. Contradicting the sound behavior and upright human nature.