Surah 9. Al-Tawba, Ayah 77

Lit., "He has caused hypocrisy to become for them consequence (a'qabahum) in their hearts until the Day on which they shall meet Him" (i.e., until their resurrection). Thus, the Qur'an states that it is excessive love of worldly possessions which gives rise, in a certain type of man, to the attitude of mind described as "hypocrisy" - and not vice versa (see also 29:11 and the corresponding note [7]). Cf. in this connection the Prophet's saying, reported by Abu Hurayrah: "The mark (ayah) of the hypocrite is threefold: when he speaks, he lies; and when he promises, he breaks his promise; and when he is trusted, he betrays" (Bukhari, Muslim, Tirmidhi and Nasa'i; similar Traditions, on the authority of 'Abd Allah ibn 'Amr, are quoted by Bukhari, Muslim, Abu Da'ud, Nasa'i, Ibn Majah and Ibn Hanbal).

I.e., to themselves, trying to find excuses for their breaking their vow.

If men are false to their covenants and words, the natural consequence will be hypocrisy to cover their falsehood. Such consequences will last till the Day of Judgment, when they will have to account for their deeds. They may think that they are deceiving men by their hypocrisy, but they cannot deceive Allah, to Whom all their most secret thoughts and plots and doings are known.