The Prophet (peace and blessings be upon him) said:
"When the ablution of any of you breaks during his prayer, he should hold his nose and then leave (the prayer to perform ablution)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 286
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[هـ ك حب هق] عن عائشة. المشكاة ١٠٠٧.