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)