Is the petitioner, who promised more than one person to perform 'Umrah on behalf of their parents, obliged to fulfill his promise, or is he sinful for not having done so yet?

Fulfilling promises is a quality of righteousness. The Prophet (peace and blessings be upon him) considered breaking promises to be a characteristic of hypocrites. Allah the Almighty praised Isma'il (peace be upon him) for being truthful in his promise. Scholars have differed regarding the ruling on fulfilling promises: the majority held that it is recommendable, not obligatory, while many scholars favored its obligatoriness absolutely, or if the promisee was put in a difficult situation. The eminent scholar Al-Shinqiti preferred the obligatoriness of fulfilling a promise, citing as evidence the fact that breaking it is a sign of hypocrites, and Allah's saying: "Most hateful is it in the sight of Allah that you say what you do not do" (Quran 61:3). It should be noted, however, that the promisor is not legally compelled to fulfill it. Therefore, we advise fulfilling the Umrah (definition) promises before the end of the study period in Makkah, to achieve the virtue of fulfilling promises, to avoid the disagreement of those who consider it obligatory, and so that you may be rewarded for your good deed. In case of non-fulfillment, the promisee should be informed.