Narrated Ka`b bin Malik: Whenever Allah's Apostle intended to lead a Ghazwa, he would use an equivocation from which one would understand that he was going to a different destination .
Related hadith on this topic
Explanation & Benefits
Maulana Dawood Raz
Hadith Commentary:
The meaning of the word "tawriyah" is to say something in an indirect or allusive manner so that it is not clearly understood by everyone.
Such tawriyah is permissible for military interests.
Perhaps the wisdom in this is what has been narrated from his (sallallahu alayhi wa sallam) statement: "Blessing has been placed for my ummah in their early morning (bukoor) on Thursday," and the fact that the Prophet (sallallahu alayhi wa sallam) used to prefer setting out on a Thursday does not necessitate regularity upon it, as there may be something preventing it. It will come in a later chapter that he set out on a Saturday in some of his journeys. Then the author has cited a portion of the lengthy hadith of Ka‘b ibn Malik, and it is evident regarding what he has titled the chapter for. Al-Kirmani said: Ka‘b is Ibn Malik al-Ansari, one of the three who were left behind, and he became blind, and he had sons, among whom ‘Abdullah used to lead him by the hand from among his seven sons. (Bukhari Commentary)
That is, the wisdom in this is that it is narrated from the Prophet (sallallahu alayhi wa sallam) that blessing has been placed for my ummah in setting out for travel on Thursday morning, but regularity upon this is not established, because in some journeys the Prophet (sallallahu alayhi wa sallam) also set out on a Saturday.
The Imam (rahimahullah) here has brought the lengthy hadith of Ka‘b ibn Malik, from which the chapter heading is evident.
Ka‘b ibn Malik is that same Ansari companion who stayed behind at Tabuk.
He (radi Allahu anhu) had several sons, among whom a son named ‘Abdullah used to take him by the hand and walk with him.
Source: Sahih Bukhari: Commentary by Maulana Dawood Raz, Page: 2947