Hadith 651Q1

قَالَ مَالِكٌ : لَا بَأْسَ بِنِكَاحِ الْمُعْتَكِفِ نِكَاحَ الْمِلْكِ. مَا لَمْ يَكُنِ الْمَسِيسُ، وَالْمَرْأَةُ الْمُعْتَكِفَةُ أَيْضًا ، تُنْكَحُ نِكَاحَ الْخِطْبَةِ. مَا لَمْ يَكُنِ الْمَسِيسُ ، وَيَحْرُمُ عَلَى الْمُعْتَكِفِ مِنْ أَهْلِهِ، بِاللَّيْلِ مَا يَحْرُمُ عَلَيْهِ مِنْهُنَّ بِالنَّهَارِ.
Imam Malik, may Allah have mercy on him, said: If a person observing i'tikaf contracts a marriage during the state of i'tikaf, there is nothing objectionable in it, but physical contact is not permissible. Similarly, a woman can only contract a marriage during i'tikaf, but physical contact is not allowed. And whatever acts are prohibited for the person observing i'tikaf with his wife during the day are also prohibited at night.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب الاعتكاف / 651Q1
Hadith Takhrij «شركة الحروف نمبر: 646، فواد عبدالباقي نمبر: 19 - كِتَابُ الِاعْتِكَافِ-ح: 8»