«إذا حضر أحدكم الأمر يخشى فواته فليصل هذه الصلاة - يعني الجمع بين الصلاتين -»
The Prophet (peace and blessings be upon him) said:
"When one of you is faced with an important matter which he fears he will miss, let him pray in this way, that is, let him combine two prayers (together)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 487