there is only one scripture that supports such.. when Issac finds his wife. it appears that God leads hi to one and only one for issac.. and thats because he had to choose her from his old family ect.. at may have been one of only few.. period.
as for each christian.. I would say, look at how God chose david as king.. Samuel went to all the sons of jesse.. each one God rejected.. to the point that Samuel, having faith in God, and in His ability to lead him, went and asked jesse,. do you have any other son?? and sure enough he did..
now I will ask, what if the 3rd son was david.. and God said He’s the one.. should samuel have looked further.. (at the other ones)? definitely NO!
Ask God to lead you.. knowing that there are many that could be your mate.. and YOU choose. (always asking God to help you)
Prov 18:22 Whoso findeth a wife findeth a good thing, and obtaineth favour of the LORD. YOU do the finding.
Ps 128: (God has promised those who follow Him a mate)
 Blessed is every one that feareth the LORD; that walketh in his ways.
 For thou shalt eat the labour of thine hands: happy shalt thou be, and it shall be well with thee.
 THY WIFE shall be as a fruitful vine by the sides of thine house: THY CHILDREN like olive plants round about thy table.
 Behold, that thus shall the man be blessed that feareth the LORD.
1Cor 7notice how the general theme here is OUR CHOICE.. not under some obligation or legalistic thing as to who we marry.. except it must be in the Lord)
 Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
 I say therefore to the unmarried and widows, It is good for them if they abide even as I.
 But if they cannot contain, let them marry: for it is better to marry than to burn.
 But and if thou marry, thou hast not sinned; and if a virgin marry, she hath not sinned. Nevertheless such shall have trouble in the flesh: but I spare you.
 But I would have you without carefulness. He that is unmarried careth for the things that belong to the Lord, how he may please the Lord:
 But he that is married careth for the things that are of the world, how he may please his wife.
 There is difference also between a wife and a virgin. The unmarried woman careth for the things of the Lord, that she may be holy both in body and in spirit: but she that is married careth for the things of the world, how she may please her husband.
 And this I speak for your own profit; not that I may cast a snare upon you, but for that which is comely, and that ye may attend upon the Lord without distraction.
 But if any man think that he behaveth himself uncomely toward his virgin, if she pass the flower of her age, and need so require, let him do what he will, he sinneth not: let them marry.
 Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.
 So then he that giveth her in marriage doeth well; but he that giveth her not in marriage doeth better.
what do you think?