Lit. “ʿUwaysh” is a term of endearment in Arabic, meaning “my little one” or “my darling.” It was used by the Messenger of Allah (ﷺ) to affectionately address his wife, ʿĀ’isha bint Abī Bakr (رضي الله عنها).

Narrated Muḥammad ibn Abī Bakr (رحمه اللّٰه):

When ʿĀ’isha (رضي الله عنها) would become angry, the Messenger of Allah (ﷺ) would stroke her nose and say:

“O ʿUwaysh! Say:

اَللّٰهُمَّ رَبَّ مُحَمَّدٍ ، اغْفِرْ لِيْ ذَنْبِيْ ، وَأَذْهِبْ غَيْظَ قَلْبِيْ ، وَأَعِذْنِيْ مِنْ مُضِلَّاتِ الْفِتَنِ

_{Allāhumma Rabba Muḥammad (ﷺ), ighfir lī dhambī, wa adh-hib ghayẓa qalbī, wa aʿidhnī min muḍillāti-l-fitan.}

O Allah, Lord of Muḥammad (ﷺ), forgive my sins, remove the anger of my heart, and protect me from misleading trials.”

Source: Ibn al-Sunnī, ʿAmal al-Yawm wa-l-Laylah (456)

Aameen!