2 sentences

1. 他向来守信，绝不会食言。

   tā xiàng​lái shǒu​xìn, jué bù huì shí​yán.

   He has always been a man of his word and would never break a promise.

   Source: Dong Chinese Dictionary

2. 我向你发誓，我绝不食言。

   wǒ xiàng nǐ fā shì, wǒ jué bù shí​yán.

   I swear to you that I will not go back on my word.

   Source: Dong Chinese Dictionary