Following are a number of back-translations of Romans 4:21:

• Uma: “because he believed that God had the power to make his promise come to pass.” (Source: Uma Back Translation)
• Yakan: “He was really certain that God would do what he had promised.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “For his trust was very strong that God would carry out His promise.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “Because his mind was utterly resolute/certain that God was able to fulfill what he had promised.” (Source: Kankanaey Back Translation)
• Tenango Otomi: “Abraham even more was sure that God had the power to do all that he promised to do.” (Source: Tenango Otomi Back Translation)