The Sufficient (Vol 5) · Hadith 1725 (#Ḥadīth #3)
Chapter 95 | Such Wives Are Like Slave-girls, Not Like any of Four Wives
3- مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنِ ابْنِ رِئَابٍ عَنْ زُرَارَةَ بْنِ أَعْيَنَ قَالَ قُلْتُ مَا يَحِلُّ مِنَ الْمُتْعَةِ قَالَ كَمْ شِئْتَ.
3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Mahbub from ibn Ri’ab from Zurarah ibn ‘A‘yan who has said the following: “I once asked him (the Imam) , ‘How many is lawful for al-Mut‘ah (advantageous marriage)?’ He (the Imam) said, ‘It is as many as you wish.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).