Muwatta Malik · Hadith 651

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَنْهَى عَنِ الْقُبْلَةِ، وَالْمُبَاشَرَةِ، لِلصَّائِمِ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to forbid kissing and fondling for people who were fasting

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).