I/We am/are deeply saddened by the loss of your (insert relationship of bereaved to deceased here). He/she will be truly missed and I/we will include him/her in my/our daily prayers.
I/We am/are truly sorry to hear of the loss of (insert Name of deceased here.). Please accept our condolences and may our prayers help comfort you and hasten the journey of his/her soul to Heaven.
Please accept our/my condolences, just know that we/I are/am here for you, and please do not hesitate to reach out, especially during this difficult time.
My/Our deepest sympathies go out to you and your family. In this tough time in your life, may my/our friendship, sympathy and heartfelt condolences bring you comfort.
Hearing about your loss has deeply saddened me/us, but I/we know that this is far from what you are going through right now. You are in my/our thoughts and my/our heartfelt sympathy goes out to you and your family.
Please accept my/our condolences on the passing of your (insert relationship of deceased to bereaved here). It was an honor to have known such a great person and I/we will truly miss him/her.