Narrated Dukayn ibn Sa'id al-Muzani:

We came to the Prophet ﷺ and asked him for some corn. He said: Go, Umar, and give them. He ascended with us a room upstairs, took a key from his apartment and opened it.

حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ مُطَرِّفٍ الرُّؤَاسِيُّ، حَدَّثَنَا عِيسَى، عَنْ إِسْمَاعِيلَ، عَنْ قَيْسٍ، عَنْ دُكَيْنِ بْنِ سَعِيدٍ الْمُزَنِيِّ، قَالَ أَتَيْنَا النَّبِيَّ ﷺ فَسَأَلْنَاهُ الطَّعَامَ فَقَالَ
" يَا عُمَرُ اذْهَبْ فَأَعْطِهِمْ " . فَارْتَقَى بِنَا إِلَى عِلِّيَّةٍ فَأَخَذَ الْمِفْتَاحَ مِنْ حُجْزَتِهِ فَفَتَحَ .