Muwatta Malik 405
موطأ مالك#405Sahihوَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ إِذَا لَمْ يَسْتَطِعِ الْمَرِيضُ السُّجُودَ أَوْمَأَ بِرَأْسِهِ إِيمَاءً وَلَمْ يَرْفَعْ إِلَى جَبْهَتِهِ شَيْئًا .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, "When a sick man is unable to prostrate he should motion with his head, and not raise anything to his forehead
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Sahih
In-book reference: 9:80