Teaching by Venerable Luang Phor Uttama（หลวงพ่ออุตตมะ ဦးဥတ်တမ）

We have to believe in the law of kamma. According to the Abhidhamma, even though one may have engaged in many meritous acts in this life, if one is frightened at the time of death, i.e. one's mind is overwhelmed with disturbing emotions and fleeting thoughts, one will inevitably recollect the negative deeds that oneself has done in this life.

If you follow this thought process at the time of death, you will not have a fortunate rebirth, and will inevitably take birth in the womb of a non-virtuous person. Therefore, when one is about to die, one should recite arahang, arahang continuously and let the mind focus on the mantra.

Let the mind only dwell in goodness. Alternatively, others could invite the Venerable Sangha to do chanting for the one who is about to pass.