Answer
✅Answer: Please pay attention to the following narrations:
1 عَنْ زُرَارَةَ عَنْ أَبِي عَبْدِ اللَّهِ قَالَ: لَا تَكُونُ مُتْعَةٌ إِلَّا بِأَمْرَيْنِ أَجَلٍ مُسَمًّى وَ أَجْرٍ مُسَمًّى.
📚 Al-Kafi, Vol. 5, p. 455
Imam Sadiq (peace be upon him) said: 'There is no mut'ah except with two things: a specified and defined duration and a specified and defined payment!'
2 عَنْ أَبِي بَصِيرٍ قَالَ: لَا بُدَّ مِنْ أَنْ تَقُولَ فِيهِ هَذِهِ الشُّرُوطَ أَتَزَوَّجُكِ مُتْعَةً كَذَا وَ كَذَا يَوْماً بِكَذَا وَ كَذَا دِرْهَماً الْحَدِيثَ.
📚 Al-Kafi, Vol. 5, p. 455
Abu Basir said: '(Imam Sadiq, peace be upon him) said: 'It is necessary to say these conditions:
أَتَزَوَّجُكِ مُتْعَةً كَذَا وَ كَذَا يَوْماً بِكَذَا وَ كَذَا دِرْهَماً
Meaning: I marry you in mut'ah for a certain number of days for a certain amount!'
3 عَنْ إِسْمَاعِيلَ بْنِ الْفَضْلِ الْهَاشِمِيِّ قَالَ: سَأَلْتُ أَبَا عَبْدِ اللَّهِ عَنِ الْمُتْعَةِ فَقَالَ مَهْرٌ مَعْلُومٌ إِلَى أَجَلٍ مَعْلُومٍ.
📚 Al-Tahdhib, Vol. 7, p. 262
Isma'il ibn Fadl al-Hashimi said: 'I asked Imam Sadiq (peace be upon him) about mut'ah.' He said: 'A known dowry for a known duration!'
4 عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ فِي الْمُتْعَةِ قَالَ لَا بُدَّ مِنْ أَنْ يُصْدِقَهَا شَيْئاً قَلَّ أَوْ كَثُرَ وَ الصَّدَاقُ كُلُّ شَيْ ءٍ تَرَاضَيَا عَلَيْهِ فِي تَمَتُّعٍ أَوْ تَزْوِيجٍ بِغَيْرِ مُتْعَةٍ.
📚 Al-Faqih, Vol. 3, p. 464
Imam Baqir (peace be upon him) said about mut'ah: 'It is necessary and unavoidable to set something as her dowry, be it little or much! And the dowry is whatever they agree upon in temporary and permanent marriage!'
✅Based on the above narrations and others, specifying the duration and specifying the amount of the dowry are among the necessary conditions for a temporary marriage (mut'ah), and therefore, omitting the dowry invalidates the mut'ah, and such a contract lacks the necessary conditions and is void.
✅However, regarding the omission of mentioning the duration in a temporary contract, please refer to the following link:
✅Regarding the amount of the dowry in a temporary contract, please refer to the following link:
اللَّهُمَّ فَصَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْرَ