Is it obligatory to fulfill a vow to donate money before going to Hajj, or is it permissible to postpone and pay it in installments, knowing that the one who made the vow was ignorant that making vows is disliked?

If a person vows to give a certain amount in charity immediately upon the fulfillment of their need, they are obligated to fulfill it promptly without delay or installments, unless it conflicts with the Hajj. If they did not intend immediacy, then delay and installments are permissible for them.