Muwatta Malik 1172
موطأ مالك#1172SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ سَأَلَ ابْنَ شِهَابٍ عَنْ إِيلاَءِ الْعَبْدِ، فَقَالَ هُوَ نَحْوُ إِيلاَءِ الْحُرِّ وَهُوَ عَلَيْهِ وَاجِبٌ وَإِيلاَءُ الْعَبْدِ شَهْرَانِ .
Yahya related to me from Malik that he had asked Ibn Shihab about the ila of the slave. He said that it was like the ila of the free man, and it put an obligation on him. The ila of the slave was two months
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 29:1