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 aboutthe ila of the slave. He said that it was like the ila of the freeman, and it put an obligation on him. The ila of the slave was twomonths. Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1175
Web Ref:  Muwatta Imam Malik Book 29 Hadith 19