The popular supplication at breaking fast that goes thus:

اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ

Allaahumma laka sumtu wa ‘ala riziqika aftar’tu.

(Oh Allâh! I fasted because of You and upon Your provisions I break my fast).

The hadith was reported by a not well-known Taabi’yy, Muâdh bn Zuhrah. Thus there is a cut between him and the Prophet – salaLlâhu alayhi wa sallam. See Al-Ir’wâ [4/38] of al-Imâm al-Albânî (may Allâh bestow mercy on him).